Troubleshooting Webex Calling hot desking sign-in failures

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Sources

1. 1
   An administrator can modify a hot desking booking's end time or end the session from Control Hub under Management > Workspaces > workspace > Real-Time Utilization Metrics.

   Configure Hot Desking for phones on Control Hub · Manage user bookings · Checked 2026-10-02
2. 2
   When an administrator modifies a hot desking session, the booking end time cannot be extended beyond midnight or set before the current time.

   Add and manage hot desk only devices · Manage hot desking sessions on behalf of users · Checked 2026-10-02
3. 3
   Cisco's Webex App article says a user who cannot see the hot desking QR scanner feature should ask their organization administrator to enable it.

   Webex App | QR code scanner for Hot desking · Note at top of article · Checked 2026-10-02
4. 4
   For hot desk QR sign-in, iOS users scan the code with the device's camera app after signing in to Webex, while Android users open Webex and tap Connect to a device and then QR code.

   Webex App | QR code scanner for Hot desking · iOS and Android steps · Checked 2026-10-02
5. 5
   A user cannot sign out of a hot desk phone from Webex App while the phone is on an active call.

   Configure Hot Desking for phones on Control Hub · Hot Desking overview · Checked 2026-10-02
6. 6
   When the booking duration ends the user is signed out of the hot desk phone automatically, but not until any active call has ended.

   Configure Hot Desking for phones on Control Hub · Hot Desking overview · Checked 2026-10-02
7. 7
   After a user signs in to a hot desk phone, the booking screen times out after 2 minutes if the user does not confirm with Book or Book desk, and the phone signs the user out.

   Sign in to a shared phone (Hot Desking) · Book the phone · Checked 2026-10-02
8. 8
   In Cisco's features-by-licence table, the Hot Desking device (host) capability is included with the Professional Workspace and Workspace licences and is supported on 88xx, 98xx and RoomOS devices.

   Features available by license type for Webex Calling · Feature table row 'Hot desking device' · Checked 2026-10-02
9. 9
   After a user signs in and books a hot desk phone, the phone is reprovisioned with the user's own directory number.

   Configure Hot Desking for phones on Control Hub · Hot Desking overview · Checked 2026-10-02
10. 10
    For QR code hot desk sign-in on Webex Edge for Devices, Proximity Mode and CloudProximity Mode must both be set to On.

    Let users sign in and book a shared device · Requirements — Webex Edge devices · Checked 2026-10-02
11. 11
    By default only the user's primary line is presented on a hot desk phone; an administrator adds more lines under Users > user > Calling > Between-user permissions > Hot Desking > Configure lines.

    Configure Hot Desking for phones on Control Hub · Configure phone lines for a Hot Desking user · Checked 2026-10-02
12. 12
    On a phone added as a hot-desk-only device, hot desking is enabled by default and cannot be disabled unless the workspace's calling service is changed from hot desk only.

    Configure Hot Desking for phones on Control Hub · Enable Hot Desking for a workspace phone · Checked 2026-10-02
13. 13
    A workspace can be changed from hot desk only to a standard or professional workspace, or from a standard workspace to hot desk only, using Edit calling service in Workspaces.

    Add and manage hot desk only devices · Change workspace licenses to or from a hot desk only workspace · Checked 2026-10-02
14. 14
    Devices onboarded as hot desk only are assigned a free hot desk only licence and do not consume a paid workspace licence.

    Add and manage hot desk only devices · License usage · Checked 2026-10-02
15. 15
    A hot desk only device that nobody is signed in to (host mode) has no phone number, receives no incoming calls, and can only place calls to emergency numbers.

    Add and manage hot desk only devices · Host profile · Checked 2026-10-02
16. 16
    In host mode, a hot desk only device has call history and contacts disabled, custom line labels forced to 'Line', speed dials disallowed and softkeys forced blank.

    Add and manage hot desk only devices · Host device configuration · Checked 2026-10-02
17. 17
    Cisco announced the cost-free hot desk only licence and onboarding model for Webex Calling workspace devices in What's new in Webex Calling under 12 February 2025.

    What's new in Webex Calling · February 12, 2025 — Enable a cost-free hot desk only license · Checked 2026-10-02
18. 18
    To add a hot desk only device, its location must be enabled for Webex Calling and have both a location main number and a location emergency callback number configured.

    Add and manage hot desk only devices · Prerequisites · Checked 2026-10-02
19. 19
    The user's Webex calendar and call history load onto a hot desk phone after sign-in only if this is configured.

    Configure Hot Desking for phones on Control Hub · Hot Desking overview · Checked 2026-10-02
20. 20
    In Cisco's features-by-licence table, the Hoteling guest capability is included with the Professional (user) and Standard licences only, while hoteling (host) is listed for all four licence types.

    Features available by license type for Webex Calling · Feature table rows 'Hoteling' and 'Hoteling guest' · Checked 2026-10-02
21. 21
    An administrator turns on hoteling for a guest user under Users > user > Calling > Between-user permissions > Hoteling and then selects the specific hoteling host.

    Hoteling in Control Hub · Turn on hoteling for a user · Checked 2026-10-02
22. 22
    Among user devices, only a user's primary device with a professional licence can be configured as a hoteling host.

    Hoteling in Control Hub · Enable a user device as a hoteling host · Checked 2026-10-02
23. 23
    For hoteling, the administrator sets an association period in hours on the host and on the guest user, and the phone logs the guest out automatically when that period elapses.

    Hoteling in Control Hub · Enable a workspace device as a hoteling host; Turn on hoteling for a user · Checked 2026-10-02
24. 24
    When a user signs in to a hoteling host as a guest, their shared lines, speed dials and monitoring keys such as BLF, call pickup and call park do not appear on the host phone.

    Hoteling in Control Hub · Hoteling in Control Hub — introduction · Checked 2026-10-02
25. 25
    A hoteling guest can use only one hoteling host at a time, namely the host selected for that user in Control Hub.

    Hoteling in Control Hub · Turn on hoteling for a user · Checked 2026-10-02
26. 26
    After a device is enabled as a hoteling host, the hoteling softkey configuration takes effect only after the phone reboots.

    Hoteling in Control Hub · Enable a workspace device as a hoteling host · Checked 2026-10-02
27. 27
    Reports of shared lines, speed dials or BLF keys not following a user onto a shared phone should first be triaged by whether the phone uses hoteling, where Cisco documents these as not carried, or hot desking, where additional lines must be configured per user.inferred

    Hoteling in Control Hub · Hoteling in Control Hub — introduction; compare eb1du4 'Configure phone lines for a Hot Desking user' · Checked 2026-10-02
28. 28
    When a shared phone shows no hot desk sign-in option, the documented preconditions to check are: the device is in a workspace (not a user's personal device), the workspace has a Workspace, Professional Workspace or hot desk only calling service, the workspace has only one device, and Scheduling is set to Hot desking.inferred

    Configure Hot Desking for phones on Control Hub · Enable Hot Desking for a workspace phone; combined with features-by-licence table row 'Hot desking device' · Checked 2026-10-02
29. 29
    Cisco IP Phone 8800 Series Multiplatform firmware 12.0(6) added support for the hot desk only calling service, in which the phone runs in host mode by default and guests sign in by scanning the QR code on the Desk available screen.

    Cisco IP Phone 8800 Series Multiplatform Phones Release Notes for Firmware Release 12.0(6) · Support for Hot Desk Only Calling Service · Checked 2026-10-02
30. 30
    Hot desking is not supported for a workspace that has multiple devices.

    Features available by license type for Webex Calling · Feature table row 'Hot desking device' note · Checked 2026-10-02
31. 31
    A hot desk phone that is booked cannot have its software upgraded or be factory reset.

    Sign in to a shared phone (Hot Desking) · Limitations note · Checked 2026-10-02
32. 32
    PhoneOS 3.2(1) (31 October 2024) added hot desk sign-in from Webex App or a mobile browser, administrator extension or termination of bookings in Control Hub, and hot-desk-only mode for 9800 and 8875 phones.

    Release Notes for Cisco PhoneOS Phones 9800 and 8875 · PhoneOS 3.2(1) — Hot Desking sign-in and booking management · Checked 2026-10-02
33. 33
    From PhoneOS 3.6(1), Desk Phone Control is supported on phones in hot desking mode, so a signed-in user can control the phone from Webex App.

    Release Notes for Cisco PhoneOS Phones 9800 and 8875 · PhoneOS 3.6(1) — Enhancements for Hot Desking · Checked 2026-10-02
34. 34
    From PhoneOS 3.6(1) (17 November 2025), 9800 Series phones support hot desk reservations made through Cisco Spaces or third-party booking apps, and a reserved phone allows sign-in only by the user who reserved it.

    Release Notes for Cisco PhoneOS Phones 9800 and 8875 · PhoneOS 3.6(1) — Enhancements for Hot Desking · Checked 2026-10-02
35. 35
    The PhoneOS release notes list voice portal hot desk sign-in (softkey or *30) as a hot desking enhancement under PhoneOS 3.4(1) (29 April 2025), and list it again under PhoneOS 4.1(1) (26 March 2026).

    Release Notes for Cisco PhoneOS Phones 9800 and 8875 · PhoneOS 3.4(1) and PhoneOS 4.1(1) — Enhancements for Hot Desking · Checked 2026-10-02
36. 36
    Cisco's Control Hub hot desking article covers the Cisco Video Phone 8875, Cisco Desk Phone 9800 Series and Cisco IP Phone 8800 Series with Multiplatform Firmware when registered to Webex Calling as a shared workspace device.

    Configure Hot Desking for phones on Control Hub · Introduction and Hot Desking overview · Checked 2026-10-02
37. 37
    Hot desk QR sign-in on a shared phone can be completed in Webex App or in a mobile web browser with Webex credentials.

    Sign in to a shared phone (Hot Desking) · Sign in with QR code · Checked 2026-10-02
38. 38
    On RoomOS devices a hot desk booking expires at 5:00 p.m. by default, and the default can be changed with the device setting Hotdesking DefaultBookingEndTime in Control Hub.

    Let users sign in and book a shared device · Booking duration section · Checked 2026-10-02
39. 39
    On a Webex desk device, fifteen minutes before a hot desk booking ends a notification offers a one-hour extension, and a user still on a call or in a meeting is signed out when they hang up.

    Sign in and book your Webex device with Hot desking · Extend or end your booking · Checked 2026-10-02
40. 40
    For hot desking on Board, Desk and Room Series devices, the device must be activated as a shared workspace device and not in Personal mode.

    Let users sign in and book a shared device · Requirements · Checked 2026-10-02
41. 41
    Users can sign in to and book hot desk devices only within their own organization or cluster.

    Let users sign in and book a shared device · Limitations · Checked 2026-10-02
42. 42
    A user signs out of a hot desk phone from the phone's hot desking menu or Sign out softkey, or from Webex App by opening Connect to a device, choosing the booked phone and selecting Sign out.

    Sign in to a shared phone (Hot Desking) · Sign out · Checked 2026-10-02
43. 43
    Hot desk phone bookings default to ending at 5 p.m. and cannot span multiple days.

    Sign in to a shared phone (Hot Desking) · Book the phone · Checked 2026-10-02
44. 44
    In Cisco's features-by-licence table, the Hot Desking user capability is included with the Professional (user) and Standard licences only.

    Features available by license type for Webex Calling · Feature table row 'Hot desking user' · Checked 2026-10-02
45. 45
    A user must have a Webex Calling licence to sign in to any hot desk device.

    Add and manage hot desk only devices · License usage · Checked 2026-10-02
46. 46
    When the hot desk phone and the user are in different locations, voice portal sign-in accepts ESN, E.164 or national format (same country code), and accepts a bare extension only if the organization's policy allows extension dialing between locations.

    Configure Hot Desking for phones on Control Hub · Hot Desking overview — voice portal identifiers · Checked 2026-10-02
47. 47
    Users start voice portal hot desk sign-in by pressing the Sign in softkey or dialling feature access code *30 on the shared phone.

    Sign in to a shared phone (Hot Desking) · Sign in with voice portal · Checked 2026-10-02
48. 48
    Voice portal hot desk sign-in works only with an individual hot desk user's mailbox; group, workspace and virtual line mailboxes are not supported for it.

    Configure Hot Desking for phones on Control Hub · Enable Hot Desking sign-in via voice portal — limitations · Checked 2026-10-02
49. 49
    If the organization has a default voicemail passcode set, voice portal hot desk sign-in is blocked.

    Configure Hot Desking for phones on Control Hub · Enable Hot Desking sign-in via voice portal — prerequisites · Checked 2026-10-02
50. 50
    Three incorrect voicemail PIN entries during voice portal hot desk sign-in lock the user's mailbox.

    Configure Hot Desking for phones on Control Hub · Enable Hot Desking sign-in via voice portal · Checked 2026-10-02
51. 51
    For voice portal hot desk sign-in to work, the location's voice portal must have a phone number or extension configured.

    Configure Hot Desking for phones on Control Hub · Enable Hot Desking sign-in via voice portal — prerequisites · Checked 2026-10-02
52. 52
    Hot desk sign-in through the voice portal is supported only on Cisco Desk Phone 9800 Series and Cisco Video Phone 8875; 8800 MPP phones use QR code sign-in.

    Configure Hot Desking for phones on Control Hub · Hot Desking overview · Checked 2026-10-02
53. 53
    Voice portal hot desk sign-in is controlled by a setting named 'Hot desk sign in using voice portal' at both the location level and the user level, and both are enabled by default.

    Configure Hot Desking for phones on Control Hub · Enable Hot Desking sign-in via voice portal · Checked 2026-10-02
54. 54
    A user must change their voicemail PIN from the default before they can sign in to a hot desk phone through the voice portal.

    Configure Hot Desking for phones on Control Hub · Enable Hot Desking sign-in via voice portal — prerequisites · Checked 2026-10-02
55. 55
    What's new in Webex Calling (28 May 2026) describes Webex profiles as bundles of calling services for hot desk environments that put shared lines, virtual lines, speed dials, monitored lines and call park extensions on the Webex device.

    What's new in Webex Calling · May 28, 2026 — Support user speed dials · Checked 2026-10-02
56. 56
    An administrator enables hot desking on a workspace phone in Control Hub under Management > Workspaces > the workspace > Scheduling by selecting Hot desking.

    Configure Hot Desking for phones on Control Hub · Enable Hot Desking for a workspace phone · Checked 2026-10-02

Documents

Cite this page

WarmTransfer. (2026, October 2). Troubleshooting Webex Calling hot desking sign-in failures. WarmTransfer. https://warmtransfer.net/knowledge/webex-calling-hot-desking-troubleshooting

@misc{warmtransfer-webex-calling-hot-desking-troubleshooting,
  title  = {Troubleshooting Webex Calling hot desking sign-in failures},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/webex-calling-hot-desking-troubleshooting},
  note   = {Verified 2026-10-02}
}