Windows 32bit Family XP RTM - 5.1.2600
XP SP1a - 1106
XP SP2 - 2180
Server 2003 RTM - 5.2.3790
Server 2003 SP1 - 1830
Server 2003 SP2 - 3959
Vista RTM - 6000.16386
Server 2008 Beta 3 - 6001.16510
Windows 64bit Family XP 64bit RTM - 5.2.3790.1830
XP 64bit SP2 - 3959
Server 2003 64bit RTM - 5.2.3790.1830
Server 2003 64bit SP2 - 3959
Vista 64bit RTM - 6000.16386
Server 2008 64bit Beta 3 - 6001.16510
Microsoft will pass out beta code Wednesday it hopes will define the next evolution of directories. It's a modular add-on that is built on a database and designed to add querying capabilities and performance never before possible in a directory.
The code is so early-stage it does not have an official name, although internally Microsoft calls it Next Generation Active Directory (NGAD). Microsoft introduced NGAD, which it calls a directory federation technology, on the second day of its annual Professional Developers Conference going on this week.