Failed to replicate to some replica machines in the topology. Microsoft Lync Server 2010, Master Replicator Agent will continuously ...

Failed to replicate to some replica machines in the topology. Microsoft Lync Server 2010, Master Replicator Agent will continuously attempt to replicate with these machines.

Out of date replicas: 
%1
Cause: Possible issues with one or more of the following services: 
 Microsoft Lync Server 2010, Master Replicator Agent 
 Microsoft Lync Server 2010, File Transfer Agent 
 Microsoft Lync Server 2010, Replica Replicator Agent (on all replica machines)
Resolution:
Check to make sure that these services are running. Also check the event logs on this machine and the replica machines to get more details on how to resolve this problem.