Starting Thursday last week i've had to disable the firewall on all of my servers. Problem started when my BES couldn't connect to exchange mailstore. I tried everything, replacing network card, switch, changing IP address, etc. I finally just for the heck of it tried disabling the firewall on exchange and boom all was working. I then started having issues with my exchange server not getting global policy updates. Scratched my head and did some searching for those problems, nothing worked, I then disabled the firewall on my domain controller and like before all is working. Any idea if there was an update last week that changed windows firewall as i can't think of anything i changed that would have caused this. I'm not sure on the security risks but having the firewall disabled can't be that good.