If you are running "Windows Defender" Beta 2 (or the
you may have noted that product and definitions updates now are
available via the "update.microsoft.com" web site, and via the
"automatic update" agent on your system.
Although we are not endorsing the use of this beta product, we recognize
that many people have been using "Windows Defender" in their
department. To maximize the effectiveness of this installation base, we
have approved distribution of Defender updates via the Windows Server
Update Service (WSUS) system as well. WSUS is the automatic update
service that is used by all computers configured to use CIT's Active
Defender users should receive definition updates automatically on their
next update cycle (cycles default to 20 hours).
CIT Technical Support Group.