At least one authentication challenge response could not be sent back to a client. There were %2 of these failures in the ...

At least one authentication challenge response could not be sent back to a client.

There were %2 of these failures in the last %1 minutes. The last one detected was this SIP message:

%3

Cause: This can occur because of low memory conditions, an empty authentication header, or because of underlying failures gathering data or interacting with the security subsystem.
Resolution:
None needed unless the failure count is high (>100). Restart the server if problem persists.

Associated Lync Server Archiving Server is able to read message from Message Queuing queue in time. Queue: %1 Acknowledgement ... Associated Lync Server Archiving Server is unable to read message from Message Queuing queue in a timely fashion. Queue: ... Associated Lync Server CDR Service is able to read message from MSMQ queue in time. Queue: %1 Acknowledgement class: %2. ... At least one attempt to reference stale (non-existent or deleted) security association was detected. There were %2 messages ... At least one authentication challenge response could not be sent back to a client. There were %2 of these failures in the ... At least one Front End Server or pool must exist before the Mediation Server can be defined. Please define a Front End Server ... At least one Front End Server or pool must exist before the Trusted Applications Server can be defined. Please define a Front ... At least one Front End Server or pool must exist in the central site before a Survivable Branch Appliance can be defined. ... At least one invalid authentication signature was detected. There were %2 messages with invalid signatures in the last %1 ...