Why is one of our universal forwarders missing from Forwarder Management on the Deployment Server?

Hi Everyone, I installed the universal forwarders on 4 of my test/uat Domain Controllers: DC01.uat DC01.tst DC02.uat DC02.tst 3 of the 4 devices are appearing in the Forwarder Management on our deployment server - DC02.tst is not showing up. However, DC02.tst is talking to the deployment server, successfully phoning home, and received the apps from our deployment server. Does anyone have any ideas on what the issue could be? Currently my only assumption is that it has something to do with servers sharing the same name, but different domain names, but it doesn't make a whole lot of sense, since the DC01s are appearing in forwarder management without a problem. Currently none of the 4 are sending logs to our Heavy Forwarders, due to port 9997 being blocked. Thank you for any help you can offer or something I can try! Cody Clark