I recently did an upgrade for a customer from 12.1 to 14. I upgraded the Enpoint Protection Manager on the server and then pushed out version 14 to all the servers and workstations on the network. Everything upgraded successfully, but after the upgrade none of the workstations were able to communicate with the domain controller. We had to uninstall Endpoint Protection from the domain controller. After that, the workstations were able to connect and regained network and internet access.
No changes were made to any policies in the manager as part of this upgrade, and everything worked find prior to the upgrade.
Can anyone point me to where I might look to make it so I can get Enpoint Protection reinstalled on the domain controller and still allow clients to be able to communicate with it? My first thought was to add the domain controller as an excluded host in the Intrusion Protection policy, but I've compared with our policies for other customers and that isn't something that is done all the time.