If calls directed to Exchange Unified Messaging Subscriber Access or Auto-attendant do not connect, you can troubleshoot the issue as follows:
- Verify that a subscriber access number has been defined on the
SIP URI dial plan that is used with Office Communications Server,
or that you have configured the auto-attendant that is associated
with the SIP dial plan with a valid telephone number and enabled
- Verify that the Exchange administrator has installed a
certificate from a CA that is trusted by both the Exchange Server
2007 servers and the Office Communications Server 2007 R2 servers.
- Use the
Integration Utility(that is, Ocsumutil.exe) to verify that
contact objects are created for the Unified Messaging subscriber
access and auto-attendant.
- If the call passes through a PSTN gateway interface, verify
that the gateway is configured to route the corresponding phone
number to Exchange Unified Messaging.