# Teams Rooms and common area phones calling

Canonical: https://warmtransfer.net/knowledge/teams-rooms-common-area-phones

Last verified: 2026-09-25

A Microsoft Teams common area phone signs in with a dedicated resource account licensed with Microsoft Teams Shared Space rather than an individual user account[^13]. Teams Rooms systems operate under distinct licensing models and Exchange mailbox configurations tailored for bookable meeting spaces[^8][^43].

## Account types and licensing

Common area phone resource accounts are created as standard user accounts that are not bookable in Exchange, whereas Teams Rooms resource accounts are created as Exchange room mailbox user objects so the room can be reserved[^8]. Device resource accounts used to sign in Teams devices differ from the voice application resource accounts used by call queues and auto attendants[^18]. Each Teams Rooms device requires its own resource account, though associated Teams panels sign in with that same room resource account[^42].

Before April 2026, the Microsoft Teams Shared Space license was named Microsoft Teams Shared Devices[^51]. Each Teams Shared Space license enables 1 device, including common area Teams Phone devices, Teams panels for BYOD rooms, desk docks for bookable desks, and Android mobile phones used as shared devices[^47]. The Teams Shared Space license includes:
- Microsoft Teams Phone[^50]
- Microsoft Intune P1[^50]
- Exchange Online Plan 2, covering cloud voicemail only without support for email or calendar[^50][^48]
- Specialty devices[^50]
- Managed Space[^50]

Voicemail on a Shared Space account can be disabled by deselecting the Exchange Online Plan 2 plan or by running `Set-CsOnlineVoicemailUserSettings -VoicemailEnabled $false`[^48]. Because Teams Phone is included in Teams Shared Space, common area phone accounts do not require a separate Teams Phone license[^15]. However, the Microsoft Teams Shared Space - Single Space license does not include Teams Phone and is intended for space analytics, BYOD rooms, and bookable desks rather than calling devices[^56]. Commercial, public sector, GCC, GCC High, and DoD tenants can acquire Teams Shared Space licenses worldwide[^46].

Teams Shared Space licenses are not supported on Teams Rooms devices[^49]. Any shared meeting device requires a Teams Rooms license—whether joining via a Teams client, anonymous join, or an identity such as Azure Communication Services—with exceptions for Direct Guest Join and Cloud Video Interop[^45]. Microsoft sells 2 current Teams Rooms licenses: Teams Rooms Basic and Teams Rooms Pro[^43]. Teams Rooms Basic is free and limited to 25 licenses per organization, requiring Pro for systems beyond that limit[^43]. Teams Rooms Pro includes Teams Phone Standard, whereas Teams Rooms Basic does not, and Phone System is listed for Pro only[^40]. Teams Rooms Basic supports peer-to-peer and group Teams calls, while Phone System and end-to-end call encryption are restricted to Pro[^36]. Additionally, conference phones running the Meeting interface require Teams Rooms Pro[^17]. Teams Rooms Basic licenses are blocked from signing in to Teams Phone devices[^35].

Both Teams Rooms Pro and Basic cover a single room; running 1 account across devices in different rooms violates license terms, and multiple systems inside 1 room require Pro[^39]. Centrally managed Teams Rooms accounts should hold only a Pro or Basic license along with any needed calling or security add-ons[^37].

## PSTN connectivity and number assignment

PSTN connectivity is not included with the Teams Shared Space license[^10]. If Direct Routing or Operator Connect is not deployed, a common area phone account requires an assigned Microsoft Calling Plan license[^10]. Teams Rooms Pro accounts similarly require a PSTN path—such as a Calling Plan, Operator Connect, or Direct Routing—for external calls, though WarmTransfer's reading of the sources is that the external calling requirement for Teams Rooms Pro resource accounts is inferred from license service plans because documentation lacks an explicit step-by-step procedure[^41].

Phone numbers are assigned using the `Set-CsPhoneNumberAssignment` cmdlet with the `-PhoneNumberType` parameter set to `CallingPlan`, `OperatorConnect` (which also covers Teams Phone Mobile), or `DirectRouting`[^29]. Assigning a Calling Plan number requires an active Teams Calling Plan license and matching usage location, sets `EnterpriseVoiceEnabled` to `True`, and can take up to 24 hours to take effect[^31]. The common area phone documentation points to general tenant telephone number management guidance rather than defining a CAP-specific number assignment procedure[^30].

## Device authentication and sign-in

A common area phone supports 3 sign-in methods: locally on the device, through another device using `microsoft.com/devicelogin`, or via remote provisioning in the Teams admin center[^16]. Microsoft strongly recommends manually setting a common area phone account password with automatic generation and first-time forced password change disabled to prevent sign-in failures[^14]. Shared device accounts must also have password expiration turned off, because expired passwords force a sign-out that requires manual remediation[^34].

Conditional Access policies and interactive MFA can affect shared device accounts[^9]. Interactive MFA prompts prevent resource accounts from signing in because no secondary device exists to approve the request; Microsoft recommends a dedicated Conditional Access policy using trusted network locations and device compliance[^27]. Furthermore, shared Teams phones should be excluded from sign-in frequency controls to prevent automatic sign-outs that require administrator action[^52].

In the United States, a Teams phone that is signed out or lacks an internet connection cannot place 911 emergency calls and displays a warning notification[^2].

## Device policies and user interface

Teams Android phones display 1 of 3 user interfaces based on the account license: User, Common Area, or Meeting[^59]. A Teams Shared Devices license renders the common area interface with an active dial pad[^59]. On common area and meeting room devices, the sign-out control is placed inside administrative settings to stop end users from signing out the unit[^58].

IP Phone policy interface overrides are restricted by license entitlements: Shared Devices allows only the common area interface, Teams Rooms allows only meeting interfaces, and E3 or E5 supports all modes[^57]. Assigning a Teams Rooms license to a common area phone forces the meeting room sign-in mode, which most common area phones do not support[^38]. Furthermore, the Teams IP Phone policy can be modified only when the signed-in account holds an alternate license such as Microsoft 365 E3/E5 or Office 365 E1/E3/E5[^12]. 

The `SignInMode` parameter in `New-CsTeamsIPPhonePolicy` supports 3 values: `UserSignIn`, `CommonAreaPhoneSignIn`, and `MeetingSignIn`[^55]. Setting `SignInMode` to `CommonAreaPhoneSignIn` enables the common area experience[^53]. When deploying phones in public spaces, Microsoft suggests an IP phone policy that restricts Global Address List (GAL) searches and blocks hot desking[^33]. The `SearchOnCommonAreaPhoneMode` parameter accepts `Enabled` or `Disabled` to regulate tenant directory search[^11].

Policy changes assigned to a common area phone account require the device to be signed out and back in, with propagation taking up to an hour[^32]. If an applied app setup policy unpins the Calling app, the on-screen dial pad will not appear[^60]. Accounts holding a Shared Devices license may also suppress call history and meeting schedules for privacy[^44].

## Hot desking and advanced calling features

Hot desking enables users to sign in temporarily to access personal contacts, calendar entries, and preferences before signing out[^22]. Hot desking is enabled via `AllowHotDesking` (`TRUE` or `FALSE`) in the IP phone policy, while `HotDeskingIdleTimeoutInMinutes` specifies the idle duration before automatic sign-out[^6][^24]. Dedicated Teams displays do not support this idle timeout parameter, and the Teams display app reached end of support on September 3, 2025, with compatibility efforts extending 2 years past that date[^19][^20]. To prevent devices from enrolling into individual user profiles, shared hot-desking phones should be excluded from device compliance policies and secured via named network locations, while individual hot-desking users can be required to perform MFA[^23].

Advanced calling on common area phones requires a supported hardware model, a Teams Shared Devices license, and Teams Android app version 1449/1.0.94.2022061702 or later[^5]. When turned on, advanced calling provides:
- Call park and retrieve[^3]
- Cloud voicemail via Exchange Online Plan 2[^3]
- Call queues and auto attendants[^3]
- Group call pickup and forwarding rules[^3]

Advanced calling can be turned on via device configuration profiles in the Teams admin center (`Teams devices > Phones > Configuration profiles > Calling settings > Advanced calling`) or locally on the phone under administrative calling settings[^4]. By default, call park remains off on common area phones unless enabled by policy[^7]. When participating in call queues, a common area phone cannot act as an agent using presence-based routing because the resource account does not reliably report presence; queues should use a method such as attendant, serial, round robin, or longest idle instead[^28].

A common area phone can also operate as a private line automatic ringdown (PLAR) hotline device that automatically dials an assigned PSTN number or directory contact when off-hook[^25]. Enabling hotline mode requires Advanced calling to be turned off and requires Teams Android app version 1449/1.0.94.2023082303 or later[^26].

## See also

- See also [Teams phones and certified devices](https://warmtransfer.net/knowledge/teams-phone-devices).
- See also [Microsoft Teams Phone architecture and licensing](https://warmtransfer.net/knowledge/teams-phone-architecture).
- See also [Teams Phone Direct Routing and SBC certification](https://warmtransfer.net/knowledge/teams-direct-routing).
- See also [Teams Operator Connect and Azure Communication routing](https://warmtransfer.net/knowledge/teams-operator-connect).
- See also [Microsoft Teams Calling Plans](https://warmtransfer.net/knowledge/teams-calling-plans).
- See also [Microsoft Teams auto attendants and call queues](https://warmtransfer.net/knowledge/teams-auto-attendant-call-queue).
- See also [Setting up dynamic emergency calling in Microsoft Teams](https://warmtransfer.net/knowledge/teams-dynamic-e911-setup).
- See also [Microsoft Teams shared calling and call delegation](https://warmtransfer.net/knowledge/teams-shared-calling).

## Applicability

The 911 calling behavior described for unauthenticated or disconnected states is specific to the United States[^2]. Teams Android app version requirements include version 1449/1.0.94.2022061702 or later for Advanced calling, and version 1449/1.0.94.2023082303 or later for hotline mode[^5][^26]. The Teams display app reached end of support on September 3, 2025[^19].

## What remains uncertain

- Emergency location and dynamic E911 for common area phones and Teams Rooms are not covered by the sources below.
- A step-by-step Teams Rooms PSTN number assignment procedure is not covered by the sources below.
- Current list prices for Teams Shared Space and Teams Rooms Pro are not covered by the sources below.
- Shared Calling on common area phones is not covered by the sources below.
- SIP Gateway for legacy SIP phones as common area phones is not covered by the sources below.
- The dial pad and PSTN call user experience on Teams Rooms on Windows and Android are not covered by the sources below.
- Specific deployment details for Android mobile phones as shared devices under Shared Space are not covered by the sources below.
- The default value and allowed integer range for `HotDeskingIdleTimeoutInMinutes` are not covered by the sources below.
- The default value for `AllowHotDesking` is not covered by the sources below.
- IP phone policy scope for Shared Space accounts is not covered by the sources below.

## Sources

[^1]: SIP Gateway bulk sign-in signs in shared accounts in batches of up to 100 devices, with at most 3 concurrent batches per region. It works only within 72 hours of onboarding, or within 7 days of a device being signed out. Accounts must have CommonAreaPhone policy, a phone number and AllowSIPDevicesCalling, and must not have MFA. Source: [Configure SIP Gateway](https://learn.microsoft.com/en-us/microsoftteams/devices/sip-gateway-configure), Bulk sign in; Bulk sign in prerequisites. Checked 2026-09-25.
[^2]: A Teams phone that is not signed in or has no internet connection cannot place 911 calls, and it shows a notification saying so. Source: [Phones for Microsoft Teams](https://learn.microsoft.com/en-us/microsoftteams/phones/phones-for-teams), Features supported by Teams phones, 'Dynamic and enhanced E911 support' Important box. Checked 2026-09-25.
[^3]: With advanced calling on, common area phones get call park and retrieve, cloud voicemail through Exchange Online Plan 2, call queues, auto attendants, group call pickup and forwarding rules. Source: [Set up the common area phones for Microsoft Teams](https://learn.microsoft.com/en-us/microsoftteams/set-up-common-area-phones), Step 6, bulleted feature list. Checked 2026-09-25.
[^4]: Advanced calling is turned on in the Teams admin center (Teams devices > Phones > Configuration profiles > the profile's calling settings > Advanced calling) or on the phone (Settings > Device settings > Admin only > Calling). Source: [Set up the common area phones for Microsoft Teams](https://learn.microsoft.com/en-us/microsoftteams/set-up-common-area-phones), Step 6, 'Turn on Advanced calling in Teams admin center' and 'Turn on Advanced calling from a Teams phone device'. Checked 2026-09-25.
[^5]: Advanced calling features on common area phones need a supported Teams phone model, a Teams Shared Devices license and Teams app version 1449/1.0.94.2022061702 or later. Source: [Set up the common area phones for Microsoft Teams](https://learn.microsoft.com/en-us/microsoftteams/set-up-common-area-phones), Step 6 - Set up Advanced calling on common area phones (optional), second paragraph. Checked 2026-09-25.
[^6]: The Teams IP Phone policy's AllowHotDesking parameter is a Boolean that turns hot desking on (TRUE) or off (FALSE). The cmdlet reference lists no default value. Source: [Set-CsTeamsIPPhonePolicy (MicrosoftTeams)](https://learn.microsoft.com/en-us/powershell/module/teams/set-csteamsipphonepolicy), Parameters, -AllowHotDesking. Checked 2026-09-25.
[^7]: Call park is off by default for common area phones; turning it on requires a policy. Source: [Set up the common area phones for Microsoft Teams](https://learn.microsoft.com/en-us/microsoftteams/set-up-common-area-phones), Step 3, 'Calling policies', second paragraph. Checked 2026-09-25.
[^8]: Common area phone resource accounts are created as standard user accounts that are not bookable in Exchange, while Teams Rooms resource accounts are created as Exchange (room mailbox) user objects so the room can be booked. Source: [Set up the common area phones for Microsoft Teams](https://learn.microsoft.com/en-us/microsoftteams/set-up-common-area-phones), Step 2 - Create a new common area phone resource account and assign licenses (Important box). Checked 2026-09-25.
[^9]: Conditional Access rules and interactive MFA can affect common area phone accounts. Source: [Set up the common area phones for Microsoft Teams](https://learn.microsoft.com/en-us/microsoftteams/set-up-common-area-phones), Step 2, 'Using PowerShell', Note. Checked 2026-09-25.
[^10]: The Teams Shared Space license does not include PSTN connectivity. A common area phone that does not use Direct Routing or Operator Connect needs a Microsoft Calling Plan license assigned to its account. Source: [Set up the common area phones for Microsoft Teams](https://learn.microsoft.com/en-us/microsoftteams/set-up-common-area-phones), Step 2, 'Using the Microsoft 365 admin center', step 6 and following Note. Checked 2026-09-25.
[^11]: The SearchOnCommonAreaPhoneMode parameter controls whether someone at a phone in common area mode can look up contacts in the tenant's global address book. Values are Enabled and Disabled. Source: [Set-CsTeamsIPPhonePolicy (MicrosoftTeams)](https://learn.microsoft.com/en-us/powershell/module/teams/set-csteamsipphonepolicy), Parameters, -SearchOnCommonAreaPhoneMode. Checked 2026-09-25.
[^12]: The Teams IP Phone policy can be modified only when the account that signs in to the phone has a license other than Teams Shared Devices, such as Microsoft 365 E3/E5 or Office 365 E1/E3/E5. Source: [Set up the common area phones for Microsoft Teams](https://learn.microsoft.com/en-us/microsoftteams/set-up-common-area-phones), Step 3 - Set policies for common area phones, 'IP phone policies', first paragraph. Checked 2026-09-25.
[^13]: A Teams common area phone is not tied to an individual user; it signs in with a common area phone resource account that holds a Microsoft Teams Shared Space license. Source: [Set up the common area phones for Microsoft Teams](https://learn.microsoft.com/en-us/microsoftteams/set-up-common-area-phones), Introduction (first paragraph). Checked 2026-09-25.
[^14]: Microsoft strongly recommends setting a common area phone account's password manually, with automatic password generation and forced change at first sign-in both turned off, to avoid sign-in problems. Source: [Set up the common area phones for Microsoft Teams](https://learn.microsoft.com/en-us/microsoftteams/set-up-common-area-phones), Step 2, 'Using the Microsoft 365 admin center', step 5 and Important box. Checked 2026-09-25.
[^15]: A common area phone account does not need a separate Teams Phone (Phone System) license because Teams Phone is included in the Teams Shared Space license. Source: [Set up the common area phones for Microsoft Teams](https://learn.microsoft.com/en-us/microsoftteams/set-up-common-area-phones), Step 2, 'Using the Microsoft 365 admin center', Note after step 6. Checked 2026-09-25.
[^16]: A common area phone can be signed in three ways: locally on the device, from another device using a code at microsoft.com/devicelogin, or by remote provisioning from the Teams admin center. Source: [Set up the common area phones for Microsoft Teams](https://learn.microsoft.com/en-us/microsoftteams/set-up-common-area-phones), Step 5 - Sign in to the Teams Phone. Checked 2026-09-25.
[^17]: Conference phones that run the Meeting interface require a Teams Rooms Pro license. Source: [Microsoft Teams Rooms licenses](https://learn.microsoft.com/en-us/microsoftteams/rooms/rooms-licensing), Teams Rooms license service plan comparison, footnote 1. Checked 2026-09-25.
[^18]: Resource accounts used to sign in Teams devices are a different type from the Teams resource accounts that call queues and auto attendants use. Source: [How to create and configure resource accounts for Teams Rooms and panels](https://learn.microsoft.com/en-us/microsoftteams/rooms/create-resource-account), Introduction (Important box) and 'Create resource account & assign the license' note. Checked 2026-09-25.
[^19]: The Teams display app reached end of support on September 3, 2025. Microsoft makes best efforts to keep it compatible with the latest app version given to manufacturers for two years after that date. Source: [Hot desking Teams displays](https://learn.microsoft.com/en-us/microsoftteams/devices/hot-desking-teams-displays), Top-of-page Important box. Checked 2026-09-25.
[^20]: Teams displays do not support the HotDeskingIdleTimeoutInMinutes setting in IP Phone policies. Source: [Hot desking Teams displays](https://learn.microsoft.com/en-us/microsoftteams/devices/hot-desking-teams-displays), Step 3 - Set policies for Teams Displays, Important box. Checked 2026-09-25.
[^21]: Field pattern: after Teams app update 1449/1.0.94.2024092304, Yealink MP54 phones in CommonAreaPhoneSignIn mode with Direct Routing lost the virtual dial pad and the physical keypad stopped responding, while inbound calls still worked. A community workaround was to enable common area GAL search temporarily and move to 1449/1.0.94.2024101709 (field report). Source: [Common Area Phones cannot dial out with new Teams App update 1449/1.0.94.2024092304 for Yealink MP54 Phones](https://learn.microsoft.com/en-us/answers/questions/afef6c8a-e3df-4f3f-bf9c-305647b9a3c4/common-area-phones-cannot-dial-out-with-new-teams?forum=msteams-all), Question (Oct 11 2024) and community reply (Nov 15 2024). Checked 2026-09-25.
[^22]: On Teams phones, hot desking lets a user sign in to a phone to get their contacts, meetings and preferences, then sign out and leave the phone ready for the next user. Source: [Phones for Microsoft Teams](https://learn.microsoft.com/en-us/microsoftteams/phones/phones-for-teams), Features supported by Teams phones, 'Hot desking' bullet. Checked 2026-09-25.
[^23]: Shared Teams phones used for hot desking should be excluded from device compliance policies, which stop the device enrolling into the hot-desk user's account. Named locations should secure them instead, and MFA can be required for the hot-desking user accounts. Source: [Authentication best practices for Teams phones](https://learn.microsoft.com/en-us/microsoftteams/phones/authentication-best-practices-phones), When and when not to require compliant shared devices, second Note. Checked 2026-09-25.
[^24]: The HotDeskingIdleTimeoutInMinutes parameter sets how many idle minutes pass before the hot-desked user is signed out. The cmdlet reference gives no default and no allowed range. Source: [Set-CsTeamsIPPhonePolicy (MicrosoftTeams)](https://learn.microsoft.com/en-us/powershell/module/teams/set-csteamsipphonepolicy), Parameters, -HotDeskingIdleTimeoutInMinutes. Checked 2026-09-25.
[^25]: A common area phone can be set up as a hotline (PLAR) phone that dials a preset PSTN number or directory contact when the handset is lifted. Source: [Set up the common area phones for Microsoft Teams](https://learn.microsoft.com/en-us/microsoftteams/set-up-common-area-phones), Step 7 - Set up Hotline/PLAR on common area phones (optional). Checked 2026-09-25.
[^26]: Before hotline is turned on in the Teams admin center, Advanced calling must be off, and the phone's Teams app must be version 1449/1.0.94.2023082303 or later. Source: [Set up the common area phones for Microsoft Teams](https://learn.microsoft.com/en-us/microsoftteams/set-up-common-area-phones), Step 7, 'Turn on Hotline in the Teams admin center', Note. Checked 2026-09-25.
[^27]: Interactive MFA under Conditional Access stops a Teams resource account from signing in because there is no second device to approve the prompt. Microsoft recommends a dedicated Conditional Access policy for these accounts that uses known network location and compliant device. Source: [Authentication best practices for Microsoft Teams shared device management of Android devices](https://learn.microsoft.com/en-us/microsoftteams/devices/authentication-best-practices-for-android-devices), Challenges with using the same controls..., item 2; 'Create a unique Conditional Access policy for resource accounts'. Checked 2026-09-25.
[^28]: A common area phone cannot be an agent in a call queue that uses presence-based routing because its account does not reliably report presence. The queue should use a method such as attendant, serial, round robin or longest idle instead. Source: [Set up the common area phones for Microsoft Teams](https://learn.microsoft.com/en-us/microsoftteams/set-up-common-area-phones), Step 6, Note after the feature list. Checked 2026-09-25.
[^29]: Phone numbers are assigned with Set-CsPhoneNumberAssignment, with -PhoneNumberType set to CallingPlan, OperatorConnect (also used for Teams Phone Mobile) or DirectRouting. Source: [Manage phone numbers for users](https://learn.microsoft.com/en-us/microsoftteams/assign-change-or-remove-a-phone-number-for-a-user), Use PowerShell to assign a phone number to a user. Checked 2026-09-25.
[^30]: The common area phone setup guide gives no CAP-specific number procedure. For Step 4 it points to the general 'Manage telephone numbers for your organization' guidance for the chosen PSTN connectivity option. Source: [Set up the common area phones for Microsoft Teams](https://learn.microsoft.com/en-us/microsoftteams/set-up-common-area-phones), Step 4 - Acquire and assign phone numbers. Checked 2026-09-25.
[^31]: A Calling Plan number can be assigned only to an account with a Teams Calling Plan license, and the number's country must match the account's usage location. Assignment sets EnterpriseVoiceEnabled to True and can take up to 24 hours. Source: [Manage phone numbers for users](https://learn.microsoft.com/en-us/microsoftteams/assign-change-or-remove-a-phone-number-for-a-user), Prerequisites; Use PowerShell to assign a phone number to a user (Notes). Checked 2026-09-25.
[^32]: After a policy is assigned to a common area phone account, the phone must be signed out and back in, and the assignment can take up to an hour to take effect. Source: [Set up the common area phones for Microsoft Teams](https://learn.microsoft.com/en-us/microsoftteams/set-up-common-area-phones), Step 3, 'Calling policies', Note. Checked 2026-09-25.
[^33]: For common area phones in public areas, Microsoft suggests an IP phone policy that restricts searching the organization's Global Address Book and blocks hot desking. Source: [Set up the common area phones for Microsoft Teams](https://learn.microsoft.com/en-us/microsoftteams/set-up-common-area-phones), Step 3, 'IP phone policies', third paragraph. Checked 2026-09-25.
[^34]: Microsoft makes 'password never expires' a requirement for shared Teams device accounts. If the password expires, the device signs out and cannot sign back in without manual intervention. Source: [How to create and configure resource accounts for Teams Rooms and panels](https://learn.microsoft.com/en-us/microsoftteams/rooms/create-resource-account), Turn off password expiration, first paragraph and Note. Checked 2026-09-25.
[^35]: Teams Rooms Basic licenses do not work on Teams Phone devices. An account with a Basic license is blocked from signing in to one. Source: [Phones for Microsoft Teams](https://learn.microsoft.com/en-us/microsoftteams/phones/phones-for-teams), Required licenses, Important box. Checked 2026-09-25.
[^36]: Teams Rooms Basic supports peer-to-peer and group Teams calls. Phone System and end-to-end call encryption are Pro-only calling features. Source: [Microsoft Teams Rooms licenses](https://learn.microsoft.com/en-us/microsoftteams/rooms/rooms-licensing), Teams Rooms Basic and Teams Rooms Pro feature comparison, Calling table. Checked 2026-09-25.
[^37]: Centrally managed Teams Rooms accounts should hold only a Teams Rooms Pro or Basic license plus any extra licenses needed for calling (such as Calling Plans) or enhanced security. Source: [Microsoft Teams Rooms licenses](https://learn.microsoft.com/en-us/microsoftteams/rooms/rooms-licensing), Assigning additional licenses, first paragraph. Checked 2026-09-25.
[^38]: If a common area phone account has a Teams Rooms license, only the meeting room sign-in mode is allowed, and most common area phones do not support that mode. Source: [Set up the common area phones for Microsoft Teams](https://learn.microsoft.com/en-us/microsoftteams/set-up-common-area-phones), Step 3, 'IP phone policies', first paragraph. Checked 2026-09-25.
[^39]: Teams Rooms Pro and Basic licenses cover a single room. Using one account on devices that are not in the same room violates the license terms. Signing in more than one system in a room with one account requires Pro. Source: [Microsoft Teams Rooms licenses](https://learn.microsoft.com/en-us/microsoftteams/rooms/rooms-licensing), Assigning additional licenses, final paragraph; Introduction, Basic bullet. Checked 2026-09-25.
[^40]: Teams Rooms Pro includes Teams Phone Standard and Teams Rooms Basic does not. In the calling feature table, 'Microsoft 365 Phone System' is listed for Pro only. Source: [Microsoft Teams Rooms licenses](https://learn.microsoft.com/en-us/microsoftteams/rooms/rooms-licensing), Teams Rooms license service plan comparison (Teams Phone Standard row); Feature comparison, Calling table. Checked 2026-09-25.
[^41]: For external PSTN calls, a Teams Rooms Pro resource account probably also needs a PSTN path (a Calling Plan license, or an Operator Connect or Direct Routing number) and a phone number assigned through the standard Teams number-assignment process. The Teams Rooms documentation reviewed gives no step-by-step procedure for this (inferred). Source: [Microsoft Teams Rooms licenses](https://learn.microsoft.com/en-us/microsoftteams/rooms/rooms-licensing), Assigning additional licenses; service plan comparison (Teams Phone Standard row). Checked 2026-09-25.
[^42]: Each Teams Rooms device needs its own resource account, and associated Teams panels sign in with the same room resource account. Source: [How to create and configure resource accounts for Teams Rooms and panels](https://learn.microsoft.com/en-us/microsoftteams/rooms/create-resource-account), Introduction Note; 'Create resource account & assign the license'. Checked 2026-09-25.
[^43]: Microsoft sells two current licenses for Teams Rooms systems: Teams Rooms Pro and Teams Rooms Basic. Basic is free and limited to 25 licenses per organization; systems beyond 25 must use Pro. Source: [Microsoft Teams Rooms licenses](https://learn.microsoft.com/en-us/microsoftteams/rooms/rooms-licensing), Introduction bullets and 'Teams Rooms license service plan comparison' (Maximum number of licenses row). Checked 2026-09-25.
[^44]: Accounts with a Shared Devices license may get only limited features on a phone. For example, call history and meeting schedules may not be kept, to protect privacy. Source: [Phones for Microsoft Teams](https://learn.microsoft.com/en-us/microsoftteams/phones/phones-for-teams), Features supported by Teams phones, final paragraph. Checked 2026-09-25.
[^45]: Any device used as a shared meeting device needs a Teams Rooms license, whether it joins through a Teams client, anonymous join, or a resource-account identity via Azure Communication Services or another framework. Per-user enterprise suite licenses are not authorized for this. Direct Guest Join and Cloud Video Interop are exceptions. Source: [Microsoft Teams Rooms licenses](https://learn.microsoft.com/en-us/microsoftteams/rooms/rooms-licensing), Introduction, Important box, first paragraph. Checked 2026-09-25.
[^46]: The Teams Shared Space license can be bought worldwide by commercial, public sector, GCC, GCC High and DoD tenants. Source: [Microsoft Teams Shared Space licensing](https://learn.microsoft.com/en-us/microsoftteams/teams-add-on-licensing/teams-shared-device-license), Teams Shared Space license availability. Checked 2026-09-25.
[^47]: A Teams Shared Space license can license common area Teams Phone devices, Teams panels for BYOD rooms, desk docks for bookable desks, and Android mobile phones used as shared devices. Each license enables one device. Source: [Microsoft Teams Shared Space licensing](https://learn.microsoft.com/en-us/microsoftteams/teams-add-on-licensing/teams-shared-device-license), Use for Teams devices. Checked 2026-09-25.
[^48]: The Exchange Online Plan 2 included with Teams Shared Space covers cloud voicemail only; email and calendar are not supported. Voicemail can be turned off by deselecting that plan or by running Set-CsOnlineVoicemailUserSettings with -VoicemailEnabled $false. Source: [Microsoft Teams Shared Space licensing](https://learn.microsoft.com/en-us/microsoftteams/teams-add-on-licensing/teams-shared-device-license), Use for Teams devices, Note after service plan list. Checked 2026-09-25.
[^49]: Teams Shared Space licenses are not supported on Teams Rooms devices and will not work there. Teams Rooms devices should get only Teams Rooms Basic, Teams Rooms Pro, or legacy Teams Rooms licenses. Source: [Microsoft Teams Rooms licenses](https://learn.microsoft.com/en-us/microsoftteams/rooms/rooms-licensing), Introduction, second Important box paragraph. Checked 2026-09-25.
[^50]: The Teams Shared Space license includes these service plans: Microsoft Teams Phone, Microsoft Intune P1, Exchange Online Plan 2 (cloud voicemail only), Specialty devices and Managed Space. Source: [Microsoft Teams Shared Space licensing](https://learn.microsoft.com/en-us/microsoftteams/teams-add-on-licensing/teams-shared-device-license), Use for Teams devices, service plan list. Checked 2026-09-25.
[^51]: The Microsoft Teams Shared Space license was called Microsoft Teams Shared Devices before April 2026. Source: [Microsoft Teams Shared Space licensing](https://learn.microsoft.com/en-us/microsoftteams/teams-add-on-licensing/teams-shared-device-license), Introduction (first paragraph). Checked 2026-09-25.
[^52]: Microsoft recommends excluding shared Teams phones from Conditional Access sign-in frequency policies, because enforcing them signs the phone out until an admin signs it back in. Source: [Authentication best practices for Teams phones](https://learn.microsoft.com/en-us/microsoftteams/phones/authentication-best-practices-phones), Exclude shared devices from sign-in frequency conditions. Checked 2026-09-25.
[^53]: Setting the Teams IP Phone policy parameter SignInMode to CommonAreaPhoneSignIn turns on the common area phone experience on a Teams phone. Source: [Set up the common area phones for Microsoft Teams](https://learn.microsoft.com/en-us/microsoftteams/set-up-common-area-phones), Step 3, 'IP phone policies', second paragraph. Checked 2026-09-25.
[^54]: The common area phone setup guide calls the meeting sign-in mode 'MeetingRoomSignIn', but the cmdlet reference and the Android UI guide spell it 'MeetingSignIn'. The published sources disagree on the correct value string (disputed). Source: [Set up the common area phones for Microsoft Teams](https://learn.microsoft.com/en-us/microsoftteams/set-up-common-area-phones), Step 3, 'IP phone policies', first paragraph (MeetingRoomSignIn). Checked 2026-09-25.
[^55]: The MicrosoftTeams cmdlet reference lists three SignInMode values for a Teams IP Phone policy: UserSignIn, CommonAreaPhoneSignIn and MeetingSignIn. Source: [New-CsTeamsIPPhonePolicy (MicrosoftTeams)](https://learn.microsoft.com/en-us/powershell/module/microsoftteams/new-csteamsipphonepolicy), Parameters, -SignInMode. Checked 2026-09-25.
[^56]: The Microsoft Teams Shared Space - Single Space license does not include Teams Phone. It is meant for bookable desks, BYOD rooms and space analytics, not calling devices. Source: [Microsoft Teams Shared Space licensing](https://learn.microsoft.com/en-us/microsoftteams/teams-add-on-licensing/teams-shared-device-license), Use for Teams devices, footnote after service plan list. Checked 2026-09-25.
[^57]: An IP Phone policy can override the interface only within what the license allows. Shared Devices allows only the common area interface, Teams Rooms allows only meeting interfaces, and E3 or E5 supports all sign-in modes. Source: [Set Microsoft Teams Android devices user interface](https://learn.microsoft.com/en-us/microsoftteams/devices/teams-android-devices-user-interface), Override automatic user interface detection, Note. Checked 2026-09-25.
[^58]: On common area and meeting room devices, the Sign out option is moved into a settings area that requires admin permissions, so end users cannot sign the device out. Source: [Set Microsoft Teams Android devices user interface](https://learn.microsoft.com/en-us/microsoftteams/devices/teams-android-devices-user-interface), Meeting interface, Important box. Checked 2026-09-25.
[^59]: Teams Android phones show one of three interfaces (User, Common Area or Meeting) based on the license of the signed-in account. A Teams Shared Devices license produces the common area interface with the dial pad shown. Source: [Set Microsoft Teams Android devices user interface](https://learn.microsoft.com/en-us/microsoftteams/devices/teams-android-devices-user-interface), Introduction; 'Common area interface'. Checked 2026-09-25.
[^60]: If a custom app setup policy unpins the Calling app, the dial pad does not appear on the common area phone. Source: [Set up the common area phones for Microsoft Teams](https://learn.microsoft.com/en-us/microsoftteams/set-up-common-area-phones), Step 5, 'Local sign-in', Note. Checked 2026-09-25.