Here is something I'm seeing a lot in my event viewer: Product: Exchange Event ID: 9175 Source: MSExchangeSA Version: 6.5.0000.0 Message: The MAPI call 'value' failed with the following error: error code That even ID 9175 is all over my event viewer - probably about 20 instances of it right after I reboot the comput. I think I've narrowed down the problem to - I can't mount my Mailbox Store in my First Storage Group for Exchange. I also get this in my event viewer: Product: Exchange Event ID: 455 Source: ESE Version: 6.5.0000.0 Message: process name (process id) file nameError %5 occurred while opening logfile error code. I think both of these events - at least the problem that reports these event ID's has caused my exchange server to just die (well, more precisly, nobody in my company can send/get email). A lot of what I've read so far says to make sure store.exe is running as a service (it is). Check permissions on certain folders (permissions are all good) - but right now, my exchange box is just dead w/nobody being able to connect via outlook or send/get email. Yesterday it was working great - today, just walked in to work and poof - stops working. Nobody has played w/the exchange box - I'm the only person in the company with access to it. I figured there was a problem when outlook 2003 was reporting: Task Microsoft Exchange Server reported error (0x8004011D) Does anyone know what's going on?? Thanks in advance all. I also read this page and all the links - but nothing helped: [URL]http://support.microsoft.com/search/default.aspx?Catalog=LCID%3D1033%26CDID%3DEN-US-KB&Product=OFF2003&LN=EN-US&SD=OFFN&Query=0x8004011D[/URL] Thanks.