I've got a SBS 2008 server that had some issues installing updates and corrupted exchange. Basically, I had to strip out exchange and reinstall it from the SBS resource cd. This was dvd 2. It is now telling me I have 94 days left to register and it's running in trial mode. No big deal, right? Just enter the SBS product key and it will continue, but NO... Exchange 2007 for SBS will not accept the SBS product key that it was originally installed with. Typical. Gotta make everything complicated. What next?

Found the solution here... http://www.acadianacomputerrepair.info/Blog/tabid/72/EntryId/1/Exchange-2007-Wont-Accept-SBS-2008-Serial-Key.aspx Apparently this behavior is a bug. Download and run the tool. It'll fix your problem.

Hi, Thank for sharing the solution.Please remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread. Thanks Gen Lin-MSFT