Microsoft Lync Server 2013, Backup Service central management backup module failed to set the backend state to backup. Backup ...

Microsoft Lync Server 2013, Backup Service central management backup module failed to set the backend state to backup. Backup service will not be able to apply changes from primary module until this issues is fixed.

Connection string: %1

Cause: Possible connection issue with the backend.
Resolution:
Make sure that the backend is up and running