News out of Microsoft today that we’ve already seen here with at least one client. It seems that upgrading your Microsoft Office SharePoint Server (MOSS) or Microsoft Project Server environments to SP2 results in your SharePoint environment being converted back into a Trial version. If not changed back, you may see a message saying that “the trial edition will expire in October 2009” or to some other date or even “trial edition has expired”.
The fix is pretty easy. You’ll need to re-enter the Product Key in the WSS Central Administration page.