DNS Registration Failing
We are currently migrating to SEP 12.1 from our previous vendor and are working currently to deploy to our server population.
Post-installation reboot we are finding that a subset of our server population is failing to register with DNS dynamically. This is generally resolved by issuing a 'ipconfig /registerdns' command from the server that SEP was installed on, however, we'd like to avoid having to do this at all (of course :) ).
The only blocks that we're seeing in the firewall logs are from LLMNR inbound to the server. All traffic to/from our private network is trusted. Nothing has shown up in any of the other logs (risk/IPS/app control/etc.). There are no errors in the Event Logs indicating a failed DNS registration either.
While I don't think it is necessarily related to SEP, it is strange this issue seems to manifest itself after SEP installation.