Hello -
From the Unity SA, go to System, then to Switch. At the bottom of the screen, check the box that says Resynch all Message Waiting Indicators. I set my 3.1(5) system for 2:00 AM and schedule it outside of backups. It takes about 10 minutes to synch 520 subscribers (Exchange 2000). My integration is Cisco CallManager 3.3.
Regards, Ginger