When moving a user from Skype for Business Server 2015 to Skype for Business Online (a hybrid deployment), the move fails with the following error:
Move-CsUser : HostedMigration fault: Error=(201), Description=(Cannot find user in Active Directory with the following SIP URI: “sip:firstname.lastname@example.org”)
The following PowerShell command is being used to perform the move:
Move-CsUser -Identity sip:email@example.com -Target sipfed.online.lync.com -Credential $cred -HostedMigrationOverrideUrl https://admin1e.online.lync.com/HostedMigration/hostedmigrationservice.svc
The user is synched to Azure AD and licensed appropriately (Office 365 Enterprise E3). Note if the user wasn’t licensed you’d get this error.
msRTCSIP properties were not being synched to Azure AD. Force a synchronisation of Azure AD Connect (Start-ADSyncSyncCycle -PolicyType Delta) and you should then be able to move the user to Skype for Business Online.