The nightly maintenance stored procedure failed on the registrar database. It will be retried in roughly 24 hours. If this ...

The nightly maintenance stored procedure failed on the registrar database. It will be retried in roughly 24 hours.  If this error continues to occur, the Lync Server service will need to be restarted.

Hresult: %1
Sql native error: %2
Cause: Possible issues with registrar back-end database.
Resolution:
Ensure the registrar back-end is functioning correctly.