Most common reason would be that you've exceeded the size of the database and it dismounted.
You should have event log errors. Regards, Michael B. Smith Consultant and Exchange MVP http://TheEssentialExchange.com From: Mark Mucher [mailto:mmuc...@bellsouth.net] Sent: Friday, May 07, 2010 9:24 AM To: MS-Exchange Admin Issues Subject: Restarting Info Store Every morning lately, when Outlook 2007 users log in, the Exchange Server 2003 (updated - running on Server 2003 Standard) shows as disconnected. The Info Store service shows as started, and restarting it solves the problem, until the next morning. I admit I haven't fully researched it, but I thought I would ask if this is a common problem with a known solution first. Thanks in advance, Mark