How to rollback unified contact store (UCS) contacts from Exchange to Lync?
In short disable UCS and move Lync contacts from Exchange mailbox to Lync.
Recently one of my client requested to disable Unified contact store and migrate Lync Contact from Exchange 2013 to Lync Server 2013.
To roll back Contact Storage from UCS to the Lync Pool, it is a straight forward two-step process:
Disable UCS policy and then roll back contacts.
1. First disable UCS in the Policy the users are associated with to prevent us migrating back:
Set-CsUserServicesPolicy -Identity "
" -UcsAllowed $False
If you want to roll back contact from UCS to Lync pool for all users then use policy name as “Global”.
2. Use below command to disable unified contact store for the individual user.
Set-CsUserServicesPolicy -Identity "UCS Enabled Users" -UcsAllowed $False
3. You can rollback the specific user using below command.
Invoke-CsUcsRollback -Identity "
Invoke-CsUcsRollback -Identity "Balu Ilag"