Our exchange server just failed and it has been fixed. Now, the voicemail is not being delivered. The CPU is also high in utilization
I also got this message in the app event viewer
Attempts to deliver Unity Message Repository messages have failed due to Unity configuration or connectivity issues with the Partner Mail Server.
AvUMRSyncSvr will suspend message delivery for 300 seconds, after which message delivery will be attempted again.
During this outage, messages may accumulate in the temporary store. 0x0000148C
Unity is not talking to the mail store. Your system is in UMR mode and your messages are probably being stored in the commserver\unitymta folder.
If you are getting any malex errors, problem is probably permissions related.
otherwise something may be wrong with the unity_servername accoutnt. Message store confiuration wizard should correc that.