SBS 2003 server - everything was running fine. 1/2 of all users all of a sudden couldn't login today.
Assign a static ip address to any client - works fine.
went thru troubleshooting switches also (moving computers around to different switches)
enabled DHCP on a secondary server - then clients could connect. (except VPN users were getting a 169.X.X.X address.
reset DHCP on sbs (removed scope, created new one), reboot, still nothing
tried running thru CEICW again also
There were only 2 things changed over night:
1. A firewall blocking policy to specific websites (i.e. myspace, facebook, etc.)
2. Enabled outbound FTP to specific sites and unchecked the "read only" parameter (isa 2004)
SBS 2003 R2