I have seen the warning/error below logged on my Lync Servers:
- “Connection attempts to the following services have failed. Another attempt will be made for each service every 10 minutes.
Service Address: 192.168.1.10:444; Pool FQDN: LyncPool1.domain.com; Down Time: 0:15
Service Address: 192.168.1.10:5061; Pool FQDN: LyncPool1.domain.com; Down Time: 0:14
Cause: The specified service(s) are unavailable.
Check the servers in the pool(s) on which the service(s) are installed.”
From what I have seen these have no impact on the server. My servers are fully patched and up-to-date.
Hope it helps.