Question : DomainPrep & 'unrecognized Exchange signature'?

Is it possible to have installed Exchange 2010 without having executed DomainPrep first?

Seems like I might not have done that ... is that a big problem?

Microsoft Exchange Best Practices Analyzer gave me this error now: "Active Directory domain 'xyz' has an unrecognized Exchange signature. Current DomainPrep version: 12639."

What should I do now? Thanks.

Answer : DomainPrep & 'unrecognized Exchange signature'?

According to a couple of entries at Technet, this is a known issue that is slated to be corrected in SP1. However, one of the solutions mentions a possible fix.

Check the following two entries:

TechNet Forum Thread: 2010 ExBPA?
http://social.technet.microsoft.com/Forums/en/exchange2010/thread/0d76559d-946b-4915-a54a-ee3914081f2e

TechNet Forum Thread: Get-MailboxDatabase writing error
http://social.technet.microsoft.com/Forums/en-US/exchange2010/thread/cb231da0-2b06-41ce-9f4a-f11d408cf07f/