Following the recent Office 2007 Service Pack 2 (SP2) release for Project Server 2007, Windows SharePoint Services 3.0 and SharePoint Server 2007 please note the following issue recently published by the SharePoint team that impacts Project Server deployments as well: Attention: Important Information on Service Pack 2
During the installation of SP2, a product expiration date is improperly activated. This means SharePoint will expire as though it was a trial installation 180 days after SP2 is deployed. The activation of the expiration date will not affect the normal function of SharePoint up until the expiration date passes. Furthermore, product expiration 180 days after SP2 installation will not affect customer’s data, configuration or application code but will render SharePoint inaccessible for end-users.
We are working to release a hotfix to automatically fix this issue. A manual work-around is currently available and involves customers re-entering their Product ID number (PID) on the Convert License Type page in Central Administration. For more information and detailed steps please read this KB article. (The KB link is not currently active, it will be available within the next 48hrs).
Brian Smith has published a workaround to this issue on the Project Support Blog: Project Server 2007: License type set to trial after loading Office Server Service Pack 2 (SP2)