Hi,
I have the same problem that someone reported here.
We have 2 UM servers with identical setups (UM config, certificates, etc) in different sites. One works perfectly. The other, you can call and configure your voice mail, call and leave a voice mail or be diverted to another number via a call answering rule.
All this works except the voice mail is not delivered. In the application event log I see:
A pipeline stage encountered the following error. Details : 'Microsoft.Exchange.Net.ExSmtpClient.TlsApiFailureException: A TLS API failure occurred. Error = 0x80090301
This is logged continuously, every minute or so, or more. If I set this UM server startup mode to only TCP, the events are not logged continuously and then only ocurr when someone tries to leave a voice message.
Both servers have UM assigned certificates with the correct subject/DNS names. The corresponding CAS servers have specific receive connectors, configured for TLS, for both the working and non-working UM server IP addresses. I have even loaded the UM certs onto our CAS servers. What-ever I try, the good server just works, and the bad one just logs this error.
Does anyone have any suggestions as to why this is?
Cheers,
Rob