I just resolved an issue where the OCS Front-End and the Exchange 2007 UM server wouldn’t talk with each other. Communicator or Phone Experience would not connect to Exchange UM.
Here is a debug from Phone Experience dialing Voice Mail…
Result-Code: 0xc3e93f30 SIPPROXY_E_INVALID_EDGE_PROXY_HEADER
…and…
SIP 480…
ms-diagnostics: 15007;reason=”UM server did not respond to request”;source=”OCS001.company.net”;dialplan=”Test.company.net”;
umserver=”ex07.company.net”;appName=”ExumRouting”
The Exchange server would produce this event, [...]
