====================== DISCLAIMER ====================This posting is provided "AS IS" with no warranties, and confers no rights.====================================================
The long and the short of it are that there aren’t any changes in IPsec that affect configuration. The (see, Changes to Functionality in Microsoft Windows Server 2003 Service Pack 1) book of SP1 doesn’t have any entries specifically for IPsec. There are some performance and reliability enhancements, but nothing major. You Windows 2000 and Windows XP policies should work just fine on Windows Server 2003 SP1.