Unless you already have an installed SQL Server 2000 system, you'll want to
use the included WMSDE.
If you don't have a Windows Server 2003 system, you'll have to install
MSDE2000 Release A.
Using MSDE2000 Release A is the option of last resort and should only be
installed when you have no Win2003 servers available, and no SQL2000 server
You need Windows CALs to use WSUS, regardless of what database environment
you use.. .except when installing WSUS on Web Edition. However, installing
WSUS on Web Edition requires you to install MSDE2000 Release A on the Web
Edition server, which effectively limits the number of clients such a server
can support to 500.
Licensing is fairly irrelevant in the case of WSUS. There are basically only
three points you need to remember.
(1) WSUS requires Windows CALs on all systems using WSUS.
(2) SQL Server 2000 requires SQL CALs for all systems updating from WSUS
using SQL Server 2000.
(3) Windows Server 2003 Web Edition does not require Windows CALs if you
install MSDE2000 Release A on the Web Edition server (but limited to 500
clients), but does require SQL Server CALs if you use a back-end database
Lawrence Garvin, M.S., MVP-Software Distribution
Everything you need for WSUS is at
And, everything else is at