Hi everyone,
 
I believe to have seen something along these lines long time ago. I personally 
have been able to integrate Asterisk with Exchange Server 2007 and divert 
Asterisk VoiceMail to Exchange......and everything has been working just fine 
except I get a lot of time out from time to time: 2/5 calls to Exchange UM 
causes a "480 Request time out"; thus asterisk will keep ringing as if it was 
calling a number that doesn't exist and eventually throw a congestion tone or 
disconnect.
 
Tech. specs
------------
SIP Gateway: Asterisk 1.2.18
SIP Proxy: SIPx 3.6
VoiceMail: Exchange Server 2007
 
The call route is as follow:DID >> Asterisk >> ring local *extension [if 
unavail.]>> VM [Exchange Srv]
 
Communications between Asterisk and Exchange pass thru SIPx
 
Has anyone been successful integrating Exchange UM as a VoiceMail system for 
Asterisk? And if so, anything would you suggest I look into in t-shooting 
efforts?
 
Thanks and have all a great one!
 
Claudius
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