SP2 converts MOSS into trial version - known issue

SP2 converts MOSS into trial version - known issue
Not sure if you are already aware about this issue: a couple of clients just reported that installing SP2 will convert MOSS installations into trial versions.
I have verified on our own machines and can confirm that SP2 indeed converts to trial version.

The good news is that just entering the old license key fixes the issue.
Official Blog: http://blogs.msdn.com/sharepoint/archive/2009/05/21/attention-important-information-on-service-pack-2.aspx

This will resolve your issue.

Cheers!!
SOURAV
ME_Mag