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Cannot start RTCSRV service after you uninstall Skype for Business Server 2015 Front End servers and Edge servers update

Symptoms
This issue occurs when you only uninstall the cumulative update 6.0.9319.55 (KB3061059) for Microsoft Skype for Business Server 2015 Front End servers and Edge servers. Or, it occurs when you uninstall the cumulative update 6.0.9319.55 for Microsoft Skype for Business Server 2015 Front End servers and Edge servers before you uninstall the cumulative update 6.0.9319.55 (KB3051958) for Microsoft Skype for Business Server 2015 core components in at least one of the following server roles:
  • Skype for Business Server 2015 - Standard Edition Server
  • Skype for Business Server 2015 - Enterprise Edition Server (Front End server and Back End server)
  • Skype for Business Server 2015 - Edge server
Note RTCSRV.exe is a process for the Front End server service.

When this issue occurs, you receive the following events:

Lync Server Event Logs

  • Source: LS Server
    Level: Error
    Event ID: 12336
    Description: The critical worker process failed to stop when shutting down.
  • Source: LS Server
    Level: Error
    Event ID: 50007
    Description: An unhandled exception was encountered
  • Source: LS Server
    Level: Error
    Event ID: 30941
    Description: Initialize failure …
  • Source: LS Server
    Level: Error
    Event ID: 30914
    Description: Initialize failure …
  • Source: LS Server
    Level: Error
    Event ID: 12330
    Description: Failed starting a worker process.
  • Source: LS Server
    Level: Error
    Event ID: 12304
    Description: The component Live Communications User Services (application: Default) reported a critical error: … but a stored procedure version mismatch was detected. The service will not start until this problem is resolved.
  • Source: LS Server
    Level: Error
    Event ID: 32137
    Description: Server could not register with the back-end since a version mismatch was detected
  • Source:
    Level: Warning
    Event ID: 32137
    Description: Server could not register with the back-end since a version mismatch was detected


Application Event Logs

  • Source: NET Runtime
    Level: Error
    Event ID: 1026
    Description: Process terminated due to an unhandled exception.
  • Source: Application Error
    Level: Error
    Event ID: 1000
    Description: RtcHost.exe fault


System Event Logs

  • Source: Service Control Manager
    Level: Error
    Event ID: 7034
    Description: FE terminated unexpectedly
  • Source: Service Control Manager
    Level: Error
    Event ID: 7024
    Description: The … FE service terminated with service-specific error %%-1007781640

Workaround
To work around this issue, you must update the local RTC database to the RTM version. To do this, follow these steps:

If the cumulative update for Skype for Business Server 2015 core components is not uninstalled, follow these steps:
  1. Run the Stop-CsWindowsService cmdlet.
  2. Uninstall the cumulative update for Skype for Business Server 2015 core components. To do this, follow these steps:
    1. Open Control Panel, and then click Program.
    2. Click the Installed Updates link.
    3. Right-click Skype for Business Server 2015, Core Components (KB3051958) with version 6.0.9319.55. Then, click Uninstall in the right-click menu.
  3. Close the existing PowerShell console sessions that have the Skype for Business PowerShell module loaded.
After you uninstall the cumulative update for Skype for Business Server 2015 core components, or if you have uninstalled this cumulative update before, follow these steps to enable the RTCSRV service to start:
  1. Start a new PowerShell console session.
  2. Run the following command:
    Import-Module SkypeForBusiness 
  3. Run the following command:
    Install-CsDatabase -Update -DatabaseType Registrar
  4. Run the Start-CsWindowsService cmdlet.

More information
To remove the cumulative updates for Skype for Business Server 2015, you must first uninstall the cumulative update for Skype for Business Server 2015 core components, and then uninstall the cumulative update for Skype for Business Server 2015 Front End servers and Edge servers.

Note We recommend that you reference the instructions that are described in Updates for Skype for Business Server 2015 (KB3061064) when you remove both cumulative updates.
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Article ID: 3066080 - Last Review: 06/23/2015 06:03:00 - Revision: 3.0

Skype for Business Server 2015

  • kbqfe kbsurveynew kbfix kbexpertiseinter KB3066080
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