Hi,
We have one customer experienced calls dropped off randomly issue recently, this is one Standard Edition FE server and Mediation server is by default collocated on the FE server.
We checked Lync logs and found that when the issue happened it will generate the following error in Event logs:
Source : LS Mediation Server
Event ID: 25072
Task Category: 1030
Details:
The Front End cannot be reached by the Mediation Server service. Additional failures will not be logged.
The Front End, xxx.local, cannot be reached by the Mediation Server service
Cause: The Mediation Server service cannot connect with the Front End Service due to network connectivity issues.
Resolution:
Please ensure network connectivity and availability of the Front End for the Mediation Server service to be able to function correctly.
And after around 20-30 seconds, I can see the connection is resume by itself and generated another Event log:
Source: LS Mediation Server
Event ID: 25085
Task Category: 1030
Details:
Mediation Server is able to reach the Front End xxx.local
I tried to search online but couldn't find the similar issues, it's really randomly happened and hard for us to duplicate the same issue. Lync server has the latest patches applied.
Anyone has any ideas? Thanks