File transfer failed. Microsoft Lync Server 2010, File Transfer Agent will continuously attempt to transfer the files. Reason: ...

File transfer failed. Microsoft Lync Server 2010, File Transfer Agent will continuously attempt to transfer the files.

Reason: %1

Cause: Microsoft Lync Server 2010, Replica Replicator Agent presented an invalid certificate.
Resolution:
Ensure that the certificate configured for Microsoft Lync Server 2010, Replica Replicator Agent is valid.