There were one hundred TLS negotiations failures with incoming connections with the following remote peer on the Mediation ...

Lync Server 2010

There were one hundred TLS negotiations failures with incoming connections with the following remote peer on the Mediation Server Gateway side TLS endpoint.

Remote Endpoint: %1

Cause: A gateway may not be configured correctly, for example the Gateway peer may not be configured to send connections to the port Mediation Server is listening to.  If this event fires multiple times in a short period for the same remote peer, the connections from this peer can be malicious connection attempts.
Resolution:
Check the Mediation Server and the Gateway server's certificates are configured correctly.  Check if the MEDIATIONSERVER_MAJOR_CONFIGURATION_ALARM (Event ID: 25057) has been fired.  Check whether the remote endpoint a known peer.

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