Rollback users from Teams to Lync Server This scenario apply only for individual or bulk moved users to Teams from Lync/SfB environment using Move-CsUser commands. It's not a common scenario where users move back to Lync from Teams but in a situation you might need it. Part of the process you may required to find hostedmigrationService related to your tenant. $url="https://admin 1a .online.lync.com/HostedMigration/hostedmigrationService.svc" you need to check above highlighted parameter which is related to your account. If you're using Get-TenantInfo.PS1 also one way of find the script and try https://www.powershellgallery.com/packages/SkypeForBusinessHybridHealth/1.1.3.0/Content/Get-TenantInfo.ps1 Once you done with $url defined you can go for next step to move user back to onprem $cr=Get-Credential Move-CsUser -Identity "madushka@deployskypeforbusiness.com" -Target "lyncpool.deployskypeforbusiness.com" -Credential $cr -Verbose Pr...