Updates for Skype for Business Server 2015 (KB3061064)

To apply the update to the Front End servers in a pool

1. Type the following cmdlet:
   
   Get-CsPoolFabricState -PoolFqdn <PoolFQDN>
   
   If this cmdlet shows any missing replicas, run the following cmdlet to recover the pool before you apply any updates:
   
   Reset-CsPoolRegistrarState -ResetType QuorumLossRecovery

2. On the first server that you want to update, run the following cmdlet:
   
   Invoke-CsComputerFailOver -ComputerName <Front End Server to be patched>
   
   This cmdlet moves all services to other Front End Servers in the pool, and takes this server offline.

3. Run the Cumulative Server Update Installer, and then select Install Updates to upgrade the server role.
   
   You can also run the following parameters together with the SkypeServerUpdateInstaller.exe command:

   • The /silentmode switch applies all applicable updates in the background.

   • The /silentmode/forcereboot switch applies all applicable updates in the background, and then automatically restart the server at the end of the installation process, if this is necessary.

   • The /extractall switch extracts the updates from the installer, and saves the updates in a subfolder that is named "Extracted" in the folder in which you ran the command.

4. On the upgraded server, run the following cmdlet:
   
   Invoke-CsComputerFailBack -ComputerName <Front End Server to be patched>
   
   The server is returned to service.

5. Repeat steps 2–4 for each server that needs to be upgraded.

To apply the update to a Back End server or Standard Edition server

1. Log on to the server that you are upgrading as a member of the CsAdministrator role.

2. Start the Skype for Business Server Management Shell: Select Start, select All Programs, select Skype for Business 2015, and then select Skype for Business Server Management Shell.

3. Stop Skype for Business Server services. At the command prompt, type: Stop-CsWindowsService

4. Stop the World Wide Web service. At the command prompt, type: net stop w3svc

5. Close all Skype for Business Server Management Shell windows.

6. Run the Cumulative Server Update Installer, and then select Install Updates to upgrade the server role.
   
   You can also run the following parameters together with the SkypeServerUpdateInstaller.exe command:

   • The /silentmode switch applies all applicable updates in the background.

   • The /silentmode /forcereboot switch applies all applicable updates in the background, and then automatically restarts the server at the end of the installation process if this is necessary.

   • The /extractall switch extracts the updates from the installer, and saves the updates in a subfolder that is named "Extracted" in the folder in which you ran the command.

7. Start the Skype for Business Server Management Shell: Select Start, select All Programs, select Skype for Business 2015, and then select Skype for Business Server Management Shell.

8. Start Skype for Business Server services. At the command prompt, type: Start-CsWindowsService

9. Restart the World Wide Web service. At the command prompt, type: net start w3svc

10. Apply the changes made to the SQL Server databases by doing one of the following:

    • If this is an Enterprise Edition Back End Server, and there are no collocated databases on this server, such as Archiving or Monitoring databases, type the following at a command prompt:
      
      Install-CsDatabase -Update -ConfiguredDatabases -SqlServerFqdn <SQL Server FQDN>

    • If this is an Enterprise Edition Back End Server, and there are collocated databases on this server, type the following at a command prompt:
      
      Install-CsDatabase -Update -ConfiguredDatabases -SqlServerFqdn <SQL Server FQDN> -ExcludeCollocatedStores

    • If this is a Standard Edition server, type the following at a command prompt:
      
      Install-CsDatabase -Update -LocalDatabases

              Note When you run the Install-CsDatabase cmdlet, you may receive the following error message            that you can safely ignore:
    
              "The existing central management store could not be updated because the existing state does not             match with the intended state."
    
              The error message will be generated when you check the state for the xds database. This error                  message is expected when you try to update the back end of a Front End pool in a pool pairing                scenario if the pool in question isn't the active Central Management Store.

11. If the Skype for Business Back End pool uses SQL AlwaysOn Availability Group, update the AlwaysOn databases accordingly as follows:

    1. Install the update on your Skype for Business server or servers.

    2. Run the following PowerShell command in your Skype for Business Management Shell (logged in by using an account that's appropriately permissioned to apply changes to the SQL AlwaysOn databases), as follows:

       Install-CsDatabase -Update -ConfiguredDatabases -SqlServerFqdn [sqlpool.contoso.com] -Verbose

       Note In this command, replace [sqlpool.contoso.com] with the fully qualified domain name (FQDN) of your AlwaysOn availability group.

Remove cumulative updates from an Enterprise Edition pool that has two front-end servers

To do this, follow these steps:

1. Stop new connections to other front-end servers by running the following command on both front-end servers:
   
   Stop-CsWindowsService -ComputerName <Computer.FQDN>

2. Uninstall any cumulative updates.

3. Restart the server, and make sure that both front-end servers are accepting new connections.

4. After both front-end servers are updated, you must run the following command:
   
   Reset-CsPoolRegistrarState -ResetType FullReset
   
   Then, run the following command:
   
   Start-CsPool -PoolFqdn <Pool.FQDN>

Remove cumulative updates from an Enterprise Edition pool that has at least three front-end servers

To do this, follow these steps:

1. Obtain the list of the upgrade domains for the Enterprise Edition pool that is associated with a front-end server. To do this, run the Get-CsPoolUpgradeReadinessState cmdlet on the front-end server.

2. Uninstall any cumulative updates for each upgrade domain.
   
   Notes

   • You must uninstall cumulative updates from one upgrade domain at a time.

   • You can remove cumulative updates in parallel from all servers that are in the same upgrade domain.

   
   To uninstall all servers that are in the same upgrade domain, follow these steps:

   1. Run the following command:
      
      Invoke-CsComputerFailover -ComputerName <Computer.FQDN>

   2. Uninstall cumulative updates on front-end servers that are associated with an upgrade domain.

   3. Run the following command:
      
      Invoke-CsComputerFailback -ComputerName <Computer.FQDN>

   Note You must repeat step 2 to uninstall cumulative updates from every upgrade domain until all upgrade domains in the pool are updated.

You must perform several configuration operations, depending on the kind of Skype for Business 2015 Enterprise Edition back-end servers that you are using.

Note If database mirroring is enabled for the back-end databases, we strongly recommend that you use the Invoke-CsDatabaseFailover -NewPrincipal Primary command, and then run the Get-CsDatabaseMirrorState -PoolFqdn <fqdn of pool> cmdlet to verify that the primary server is principal for all databases before you run the Install-CsDatabase cmdlet. If Persistent Chat is collocated (the Persistent Chat front-end service and back-end database are running on the same server), you must run the Install-CsDatabase cmdlet together with the ExcludeCollocatedStores parameter.

Skype for Business Server 2015 Monitoring Databases

If Skype for Business Monitoring databases are deployed on standalone SQL databases, run the following command:

Install-CsDatabase -ConfiguredDatabases -SqlServerFqdn 
<FEBE.FQDN>
-Verbose 

In this command, <FEBE.FQDN> is a placeholder for the actual value.

Skype for Business Server 2015 Standard Edition and other roles

1. Uninstall cumulative updates on the Standard Edition or any other server role.

2. Restart the server if it is required to do this after you uninstall these updates.