Setting up Extension Mobility in Unified CM

See also

Sources

1. 1
   Cisco publishes Extension Mobility setup instructions for Cisco Desk Phone 9800 Series phones registered to Unified CM, following the same stages as the Unified CM feature guide.

   Set up extension mobility on 9800 (Unified CM) · Article body, overview and task list · Checked 2026-09-30
2. 2
   A device profile is associated to a user at User Management > End User: in the Extension Mobility section move the profile from Available Profiles to Controlled Profiles, check the Home Cluster check box, and save.

   Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs - Extension Mobility · Associate a Device Profile to a User, steps 1-4 · Checked 2026-09-30
3. 3
   With Multiple Login Behavior set to Auto Logout, logging in to a second device, by Extension Mobility or Extension Mobility Cross Cluster, makes Unified CM log the user out of the first device automatically.

   Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs - Extension Mobility · Extension Mobility Service Parameters table, Multiple Login Behavior, Auto Logout · Checked 2026-09-30
4. 4
   The Bulk Administration Tool can add and delete several user device profiles for Extension Mobility at one time.

   Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs - Extension Mobility · Associate a Device Profile to a User, note · Checked 2026-09-30
5. 5
   Extension Mobility caches logged-in user information for 2 minutes and validates requests against the cache, so just after a PIN change both the old and the new PIN can work.

   Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs - Extension Mobility · Extension Mobility Restrictions table, Cache · Checked 2026-09-30
6. 6
   To let users change their PIN from the phone, create a phone service named Change Credential with Service URL http://server:8080/changecredential/ChangeCredentialServlet?device=#DEVICENAME# (optionally a Secure-Service URL on https port 8443 with the same path) and subscribe phones to it through Subscribe/Unsubscribe Services.

   Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs - Extension Mobility · Configure the Change Credential IP Phone Service, steps 1-7 · Checked 2026-09-30
7. 7
   Setting Clear Call Logs on Intra-Cluster EM to True clears the phone's call logs during manual Extension Mobility login and logout.

   Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs - Extension Mobility · Extension Mobility Service Parameters table, Clear Call Logs on Intra-Cluster EM · Checked 2026-09-30
8. 8
   A phone takes on the default device profile whenever a user logs in to a phone for which they have no user device profile; the default device profile holds device type, user locale, phone button template, softkey template and MLPP information.

   System Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs - Configure Endpoints · Configure Default Device Profiles, introduction · Checked 2026-09-30
9. 9
   When the login profile does not match the phone being logged in to, the system loads the device profile default for that phone model, using it for the phone button and softkey templates while copying device-independent settings such as directory numbers, speed dials, locale and user hold audio from the user's profile.

   Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs - Extension Mobility · Extension Mobility Overview · Checked 2026-09-30
10. 10
    A default device profile is configured at Device > Device Settings > Default Device Profile: choose the phone model in Device Profile Type, click Next, choose the Device Protocol, click Next, configure the fields and save.

    System Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs - Configure Endpoints · Configure Default Device Profiles, steps 1-6 · Checked 2026-09-30
11. 11
    A user device profile is created at Device > Device Settings > Device Profile: Add New, choose the Device Profile Type and then the Device Protocol, configure and save, then under Association Information click Add a new DN, enter the directory number, save, and click Reset.

    Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs - Extension Mobility · Create an Extension Mobility Device Profile for Users, steps 1-7 · Checked 2026-09-30
12. 12
    An Extension Mobility device profile acts as a virtual device that maps onto a physical device when a user logs in.

    Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs - Extension Mobility · Extension Mobility Configuration Task Flow table, row 4 · Checked 2026-09-30
13. 13
    EMCC trust between clusters is set up with bulk certificate management: activate the Bulk Provisioning Service, export certificates from each cluster to the same SFTP server and directory, consolidate them, and import the consolidated set back into each cluster.

    Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs - Extension Mobility Cross Cluster · Configure Certificates for Extension Mobility Cross Cluster · Checked 2026-09-30
14. 14
    Extension Mobility works on phones within one Unified CM cluster; Extension Mobility Cross Cluster (EMCC) lets a user from one cluster, the home cluster, log in to a phone on another, the visiting cluster.

    Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs - Extension Mobility Cross Cluster · Extension Mobility Cross Cluster Overview · Checked 2026-09-30
15. 15
    Since CUCM 12.5 the Multiple Login Behavior parameter also governs EMCC logins, and the value configured on the home cluster is the one enforced, not the visiting cluster's.

    Extension Mobility and Extension Mobility Cross Cluster: Changes in CUCM 12.5 · Multiple Login Behavior service parameter description · Checked 2026-09-30
16. 16
    EMCC prerequisites are another call-control entity that supports and is configured for EMCC, such as a second Unified CM cluster, with clusters in nonsecure or mixed mode and supported phones in secure or nonsecure mode.

    Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs - Extension Mobility Cross Cluster · Extension Mobility Cross Cluster Prerequisites · Checked 2026-09-30
17. 17
    After a successful EMCC login the visiting phone downloads its configuration from the home cluster's TFTP server and registers to the home cluster.

    Troubleshoot Extension Mobility Cross Cluster (EMCC) · EMCC login call flow · Checked 2026-09-30
18. 18
    EMCC does not support intercom, location-based call admission control (RSVP-based CAC is supported) or IPv6-only phones.

    Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs - Extension Mobility Cross Cluster · Extension Mobility Cross Cluster Restrictions · Checked 2026-09-30
19. 19
    For EMCC the phone service URL carries an extra parameter: http://<IP Address>:8080/emapp/EMAppServlet?device=#DEVICENAME#&EMCC=#EMCC#.

    Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs - Extension Mobility Cross Cluster · Configure Extension Mobility > Configure the Cisco Extension Mobility Phone Service (EMCC chapter), Service URL · Checked 2026-09-30
20. 20
    EMCC uses an intercluster SIP trunk whose Trunk Service Type is Extension Mobility Cross Clusters, carrying PSTN access and RSVP agent services.

    Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs - Extension Mobility Cross Cluster · Configure an Intercluster SIP Trunk for Extension Mobility Cross Cluster · Checked 2026-09-30
21. 21
    Cisco's EMCC task flow, after the phone feature list, is: configure Extension Mobility on both the home and remote clusters, configure certificates, configure devices and templates, configure a geolocation filter, configure EMCC feature parameters, configure an intercluster SIP trunk, configure an intercluster service profile, and configure remote cluster services.

    Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs - Extension Mobility Cross Cluster · Extension Mobility Cross Cluster Configuration Task Flow table · Checked 2026-09-30
22. 22
    Cisco warns that the remote EMCC cluster must support the minimum TLS version configured on the home cluster.

    Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs - Extension Mobility Cross Cluster · Extension Mobility Cross Cluster, note on minimum TLS version · Checked 2026-09-30
23. 23
    A login attempt fails with error 22 (Dev Logon Disabled) when the Enable Extension Mobility check box is not checked in the Phone Configuration window (Device > Phone) for that phone.

    Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs - Extension Mobility · Extension Mobility Troubleshooting, Error 22 Dev Logon Disabled · Checked 2026-09-30
24. 24
    Error 201 (Authentication Error) means the user ID or PIN was not accepted; the documented action is to check that the correct user ID and PIN were entered and have the administrator verify them.

    Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs - Extension Mobility · Extension Mobility Troubleshooting, Error 201 Authentication Error · Checked 2026-09-30
25. 25
    Error 205 (User Profile Absent) means the user has no device profile associated; the fix is to associate a device profile to the user.

    Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs - Extension Mobility · Extension Mobility Troubleshooting, Error 205 User Profile Absent · Checked 2026-09-30
26. 26
    For an EM Service Connection Error, check that the Cisco Extension Mobility service is running under Tools > Control Center - Feature Services in Cisco Unified Serviceability; for Host Not Found or HTTP 503, check Cisco Tomcat, Cisco IP Phone Services and the Cisco Extension Mobility Application under Tools > Control Center - Network Services.

    Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs - Extension Mobility · Extension Mobility Troubleshooting, EM Service Connection Error, Host Not Found, HTTP Error (503) · Checked 2026-09-30
27. 27
    To find which phones support a feature, open Cisco Unified Reporting, choose System Reports, click Unified CM Phone Feature List, generate a new report or open the existing one, set Product to All, pick the feature name, and click Submit.

    Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs - Feature Configuration Overview · Generate a Phone Feature List, steps 1-6 · Checked 2026-09-30
28. 28
    The ILS Service in the Extension Mobility service list must be activated on the publisher node.

    Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs - Extension Mobility · Activate Extension Mobility Services, note on ILS Service · Checked 2026-09-30
29. 29
    The Unified CM Release 15 feature guide states that Extension Mobility supports IPv6 and can be used with phones whose IP addressing mode is IPv6 or dual-stack.disputed

    Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs - Extension Mobility · Extension Mobility Interactions table, IPv6 · Checked 2026-09-30
30. 30
    The Unified CCE 15.0(1) Features Guide states that phones with an IP Addressing Mode of IPv6 Only cannot be used for Cisco Extension Mobility.disputed

    Cisco Unified Contact Center Enterprise Features Guide, Release 15.0(1) - Unified Communications Manager Extension Mobility · Unified Communications Manager Extension Mobility, limitations · Checked 2026-09-30
31. 31
    If the user's locale differs from the phone's locale, the phone restarts and then resets after a successful login because its configuration file is rebuilt; Cisco lists this as expected behaviour needing no action.

    Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs - Extension Mobility · Extension Mobility Restrictions table, Locale; Troubleshooting, Phone Resets · Checked 2026-09-30
32. 32
    Which phones allow login is decided phone by phone: a phone accepts Extension Mobility logins only if its Enable Extension Mobility check box is checked and it is subscribed to the Extension Mobility service, so leaving either off keeps a phone out of scope.inferred

    Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs - Extension Mobility · Subscribe to Extension Mobility; Extension Mobility Troubleshooting, Error 22 Dev Logon Disabled and Phone Services Unavailable After Logout · Checked 2026-09-30
33. 33
    If the loginType parameter is left off the service URL, users sign in with User ID and PIN.

    Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs - Extension Mobility · Configure the Cisco Extension Mobility Phone Service, step 3, loginType parameter · Checked 2026-09-30
34. 34
    Appending &loginType=DN to the service URL makes users sign in with Primary Extension and PIN, &loginType=SP with Self Service User ID and PIN, and &loginType=UID with User ID and PIN.

    Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs - Extension Mobility · Configure the Cisco Extension Mobility Phone Service, step 3, loginType parameter · Checked 2026-09-30
35. 35
    If the Cisco Extension Mobility service is stopped or restarted, users who are already logged in are not logged out automatically when the logout interval expires, and have to be logged out manually from the phone or from administration.

    Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs - Extension Mobility · Extension Mobility Restrictions table, Log Out · Checked 2026-09-30
36. 36
    After a user logs out, Unified CM sends the logout profile to the phone and restarts the phone.

    Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs - Extension Mobility · Extension Mobility Overview · Checked 2026-09-30
37. 37
    Maximum Concurrent Requests sets how many login or logout operations can run at once, with a default of 5; error 26 (Busy Please Try Again) indicates concurrent requests above that value.

    Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs - Extension Mobility · Extension Mobility Service Parameters table, Maximum Concurrent Requests; Troubleshooting, Error 26 · Checked 2026-09-30
38. 38
    Enforce Intra-cluster Maximum Login Time defaults to False, meaning no maximum; set to True, users are logged out automatically after the Intra-cluster Maximum Login Time, which is entered as HHH:MM in the range 0:00 to 168:00 and is ignored while the enforce parameter is False.

    Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs - Extension Mobility · Extension Mobility Service Parameters table, Enforce Intra-cluster Maximum Login Time and Intra-cluster Maximum Login Time · Checked 2026-09-30
39. 39
    With Multiple Logins Not Allowed, a user can be logged in to only one device; a login attempt on a second device fails and the phone shows error code 25.

    Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs - Extension Mobility · Extension Mobility Service Parameters table, Multiple Login Behavior; Troubleshooting, Error 25 User Logged in Elsewhere · Checked 2026-09-30
40. 40
    The Multiple Login Behavior service parameter has three values, Multiple Logins Allowed, Multiple Logins Not Allowed and Auto Logout, and the default is Multiple Logins Not Allowed.

    Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs - Extension Mobility · Extension Mobility Service Parameters table, Multiple Login Behavior · Checked 2026-09-30
41. 41
    Cisco Extension Mobility lets users temporarily access their phone settings, such as line appearances, services and speed dials, from other phones in the system.

    Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs - Extension Mobility · Extension Mobility Overview, first sentence · Checked 2026-09-30
42. 42
    The Extension Mobility IP phone service is created in Cisco Unified CM Administration at Device > Device Settings > Phone Services: Add New, enter a Service Name and the Service URL, choose in Service Type whether it appears under the Services, Directories or Messages button, and save.

    Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs - Extension Mobility · Configure the Cisco Extension Mobility Phone Service, steps 1-5 · Checked 2026-09-30
43. 43
    Extension Mobility login requires a physical Cisco Unified IP Phone; users cannot log in to their office phone remotely.

    Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs - Extension Mobility · Extension Mobility Restrictions table, IP Phones · Checked 2026-09-30
44. 44
    The documented prerequisites for Extension Mobility are a reachable TFTP server and phones that support the feature; Cisco says it extends to most Cisco Unified IP Phones and to check the phone documentation.

    Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs - Extension Mobility · Extension Mobility Prerequisites · Checked 2026-09-30
45. 45
    When a user logs in and has a user device profile that matches the phone model, the system reconfigures the phone with that user's profile information.

    Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs - Extension Mobility · Extension Mobility Overview · Checked 2026-09-30
46. 46
    Extension Mobility is disabled on protected phones (the secure tone feature), and Extension Mobility does not support hold reversion.

    Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs - Extension Mobility · Extension Mobility Restrictions table, Secure Tone and Hold Reversion · Checked 2026-09-30
47. 47
    Remember the Last User Logged In, when True, keeps the last user's ID on the phone and is meant for a phone with only one user; it applies only to the default service URL or a URL with loginType=UID.

    Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs - Extension Mobility · Extension Mobility Service Parameters table, Remember the Last User Logged In; Restrictions table, Remember Last User · Checked 2026-09-30
48. 48
    Extension Mobility service parameters are set at System > Service Parameters: choose a node running the Cisco Extension Mobility service, choose the Cisco Extension Mobility service, click Advanced to show all parameters, and save.

    Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs - Extension Mobility · Configure Service Parameters for Extension Mobility, steps 1-5 · Checked 2026-09-30
49. 49
    The Extension Mobility service URL is case-sensitive, and checking it is one of the first documented troubleshooting steps.

    Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs - Extension Mobility · Extension Mobility Troubleshooting > Troubleshoot Extension Mobility · Checked 2026-09-30
50. 50
    The Extension Mobility service URL has the form http://<IP Address>:8080/emapp/EMAppServlet?device=#DEVICENAME#, and an IPv6 address is written in square brackets in place of the IP address.

    Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs - Extension Mobility · Configure the Cisco Extension Mobility Phone Service, step 3 (Service URL) · Checked 2026-09-30
51. 51
    Extension Mobility services are activated in Cisco Unified Serviceability under Tools > Service Activation: select the node, then activate Cisco CallManager, Cisco Tftp, Cisco Extension Mobility and ILS Service, and save.

    Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs - Extension Mobility · Activate Extension Mobility Services, steps 1-5 · Checked 2026-09-30
52. 52
    To subscribe a phone or a device profile to the Extension Mobility service, open it under Device > Phone or Device > Device Settings > Device Profile, choose Subscribe/Unsubscribe Services from Related Links, click Go, select the Extension Mobility service, click Next, click Subscribe, then save and close the popup.

    Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs - Extension Mobility · Subscribe to Extension Mobility, steps 1-7 · Checked 2026-09-30
53. 53
    Cisco's Extension Mobility task flow runs in this order: generate a phone feature list, activate Extension Mobility services, configure the Extension Mobility phone service, create a device profile for users, associate the device profile to a user, subscribe to Extension Mobility, configure the Change Credential phone service, and optionally configure service parameters.

    Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs - Extension Mobility · Extension Mobility Configuration Task Flow table · Checked 2026-09-30
54. 54
    Extension Mobility debug tracing is enabled in Cisco Unified Serviceability under Trace > Trace Configuration by selecting Cisco Extension Mobility from the configured services.

    Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs - Extension Mobility · Extension Mobility Troubleshooting > Troubleshoot Extension Mobility · Checked 2026-09-30
55. 55
    For Unified CCE agents on hard phones using Extension Mobility only, Cisco recommends setting Multiple Login Behavior to Auto Logout; for mixed environments or EMCC it recommends setting the maximum login time to the typical agent shift length.

    Cisco Unified Contact Center Enterprise Features Guide, Release 15.0(1) - Unified Communications Manager Extension Mobility · Unified Communications Manager Extension Mobility, limitations and recommended settings · Checked 2026-09-30
56. 56
    In Unified CCE, if an agent fails to log out of an Extension Mobility device, another agent who tries to use that device gets a shared line error.

    Cisco Unified Contact Center Enterprise Features Guide, Release 15.0(1) - Unified Communications Manager Extension Mobility · Unified Communications Manager Extension Mobility, limitations · Checked 2026-09-30
57. 57
    If phone services disappear after login, the user's device profile had no services associated and needs the Extension Mobility service; if they disappear after logout, the phone itself needs to be subscribed to the Extension Mobility service.

    Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs - Extension Mobility · Extension Mobility Troubleshooting, Phone Services Unavailable After Login / After Logout · Checked 2026-09-30
58. 58
    If users are logged in when the publisher switches version during an upgrade and the publisher becomes inactive, their Extension Mobility profiles are logged out and they must log in again once Unified CM is active.

    Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs - Extension Mobility · Extension Mobility Troubleshooting, Extension Mobility Performance During Upgrade · Checked 2026-09-30
59. 59
    Validate IP Address, when True, checks the source IP of each login or logout request against the device cache and the Trusted List of IPs (semicolon-separated, up to 1024 characters); Allow Proxy permits requests through a web proxy and requires Validate IP Address to be True.

    Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs - Extension Mobility · Extension Mobility Service Parameters table, Validate IP Address, Trusted List of IPs, Allow Proxy · Checked 2026-09-30
60. 60
    Version 15 is the latest Cisco Unified Communications Manager major release listed on Cisco's support pages; it was released on 16 October 2023 and its status is Available.

    Cisco Unified Communications Manager (CallManager) - Support · Product status and Latest release fields; Supported versions list · Checked 2026-09-30

Documents

Cite this page

WarmTransfer. (2026, September 30). Setting up Extension Mobility in Unified CM. WarmTransfer. https://warmtransfer.net/guides/cucm-extension-mobility-setup

@misc{warmtransfer-cucm-extension-mobility-setup,
  title  = {Setting up Extension Mobility in Unified CM},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/guides/cucm-extension-mobility-setup},
  note   = {Verified 2026-09-30}
}