The passive Match Making Service cannot connect to the active Match Making Service. Access active Match Making Service: %1 ...

The passive Match Making Service cannot connect to the active Match Making Service.

Access active Match Making Service: %1 failed.
Failure occurrences: %2, since %3.

Cause: There may not be an active instance at this moment or connectivity to that machine was lost.
Resolution:
Verify the Microsoft Lync Server 2010 certificate and Microsoft Lync Server 2010 installation and make sure that the active Match Making Service is reachable.