Skype for Business error 201

Skype for Business error 201. Move-CsUser : HostedMigration fault: Error=(201).

When moving a user from Skype for Business Server 20XX to Skype for Business Online (in hybrid deployment), the move command fails with the following error:

Move-CsUser : HostedMigration fault: Error=(201), Description=(Cannot find user in Active Directory with the following SIP URI: “sip:usermailbox”)

NOTE: The following PowerShell command is being used for this operation:

Move-CsUser -Identity sip:usermailbox -Target sipfed.online.lync.com -Credential $cred -HostedMigrationOverrideUrl https://admin1e.online.lync.com/HostedMigration/hostedmigrationservice.svc

NOTE: Check that the user is synched to Azure AD and licensed appropriately.

Résolution

msRTCSIP attribute was not being synched to Azure AD. Check and force synchronization of Azure AD Connect:

Start-ADSyncSyncCycle -PolicyType Delta

When synchronization is complete run Move-CSUser the command again.

Move-CsUser -Identity sip:usermailbox -Target sipfed.online.lync.com -Credential $cred -HostedMigrationOverrideUrl https://admin1e.online.lync.com/HostedMigration/hostedmigrationservice.svc