Repeat Steps 2-4 for each server that needs to be upgraded. On the upgraded server, run the following cmdlet: Invoke-CsComputerFailBack -ComputerName This cmdlet moves all services to other Front End Servers in the pool, and takes this server offline.Īpply the upgrade or patch to this server. On the first server you want to patch, run the following cmdlet: Invoke-CsComputerFailOver -ComputerName Reset-CsPoolRegistrarState -ResetType QuorumLossRecovery If this cmdlet shows any missing replicas, then run the following cmdlet to recover the pool before you apply any patches. Type the following cmdlet: Get-CsPoolFabricState -PoolFqdn Result is the same as in first solution - entries back after computer restart. To apply an upgrade to the Front End servers in a pool Created GPO, which delete registry entries in Computer\HKEYCURRENTUSER\Software\Microsoft\Windows\CurrentVersion\Run, but entries back after computer restart. When you patch the servers in a Front End pool, you do so one server at a time. Restart the pool by typing the following cmdlet Start-CsPool If you have changed the number of servers in your Front End pool in any of the following ways, then reset the pool with by typing the following cmdlet: Reset-CsPoolRegistrarState -ResetType FullReset -PoolFqdn Reset-CsPoolRegistrarState -ResetType FullReset -PoolFqdn Also, when you add or remove a server to the pool, you must run the Skype for Business Server Deployment Wizard on each computer added or removed, for more information, see Install Skype for Business Server on servers in the topology
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