Follow the below recommended way to reboot a server in a skype/Lync pool.
- Run the command to check that the Pool Fabric State is healthy as OK and UP.
- Get-CsPoolFabricState -PoolFQDN <PoolName>
- Run the command to check the Upgrade Readiness State with
- Get-CsPoolUpgradeReadinessState. If the pool is in Ready State and the Front-End shows TRUE on the “IsReadyForUpgrade”
Now stop the services on this server gracefully.
Once service Stopped you can reboot the sever.
Happy Learning .