Microsoft Exchange 2010 Unified Messaging PBX Configuration Note for Cisco Unified Communications Manager 8.0

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Exchange 2010 Unified Messaging (UM) can be used with Cisco Unified Communications Manager (CUCM) 8.0 with a direct IP connection between the two systems.

Exchange 2010 UM presents the following functional limitations when operating with CUCM 8.0:

· Both CUCM 8.0 and Exchange UM support SRTP over a SIP trunk. However, there are SRTP cipher suite mismatch issues that are causing interoperability to fail.

· During Exchange 2007 → Exchange 2010 upgrade, users whose mailboxes are still on Exchange 2010 may be prompted twice for their phone extension when they attempt to dial the pilot number to logon to Outlook Voice Access.