MY OAB has stopped updating. I have installed nothing new on this server, except Windows Updates. This server is not an AD server and only functions as an Exchange 2003 Enterprise server. When I go into the ESM, then go to Offline Address Lists, right click on my Offline Address Book, then select Rebuild, I get a message that pops up stating:
"MAPI or an unspecified service provider
ID no: 00000000-0000-00000000
ID no: c1050000
Exchange System Manager"
I also get two identical events immediately logged:
Event ID: 9175
Category: MAPI Session
The MAPI call 'OpenMsgStore' failed with the following error:
The information store could not be opened.
The logon to the Microsoft Exchange Server computer failed.
ID no: 80040111-0286-00000000
Can anyone please help me? I used to be able to clear this error by first rebooting my Exchange server, then rebooting my AD controllers, but now it doesn't work anymore. I'm presuming some Microsoft update that was installed is now preventing this particular solution.
I have several remote users that sychronize and work offline, so the Offline Address Book is critical for them since it changes so much.