Cannot connect to different Plex server from Xbox One

I had a roommate at one time that had a Plex server that he allowed me to connect to. He since moved out and I’ve created my own Plex server. I’ve connected all of my devices, minus the Xbox One, to the server successfully. The Xbox One will ONLY connect to his. I can’t get it to disconnect. I’ve uninstalled completely and re-installed only to have the same problem. It seems to be tied to my Xbox Live account. I found one thread that indicated a server list in the upper right corner of Plex. I don’t have anything like that. Does anyone have a solution to remove the connection to a Plex server on Xbox One??

Can you not move the cursor up to highlight where the server name is and click A to open this list?
Is your server set up to be accessible remotely? This is required for the Xbox to be able to access your server, even locally.