Did this happen with anyone else:
After installing some security updates from Microsoft on one of our Domain Controllers, user accounts are getting deleted randomly from Active Directory. Some computer accounts are also getting removed but less numbers than the user accounts. I re-created those accounts but some of them disappeared again. Checked Event Viewer but nothing suspicious there. Only thing I notices that the problem started after installing security updates from Microsoft.
It started on Tuesday 15/12/2009.
PDC: Windows 2003 R2 SP2
BDC: Windows 2000 Server SP4
Exchange 2007 on a seperate server
Thanks in advance.