I tried to upgrade our Exchange 2007 Standard server to SP1 by running the wizzard. The installation failed while upgrading the schema with the message:Organization Preparation ......................... FAILED The accepted domain financial.com already exists.After the failed upgarde i run the best practice analyzer and made a TODO report. The report shows one critical error: Unknown schema extension version : Active Directory Forest The Exchange schema extensions are from an unknown version. Schema version detected is 11116.So it seems the schema was upgraded and then something failed. The Exchange server seems to wirk correctly, but i am not very happy with the current situation.Any ideas what to do next?

The Problem is resolved. A non standard settings for accepted domains was the issue. It was set to "*.financial.com", after changing it to "financial.com" eveything worked.

My new Exchange 2007 was also encountered this problem during SP1 upgrade. but the problem is still persisted even i have changed to "domainname.com" and removed any "*.domainname.com" Do Experts have any ideas?? thanks