Sonarr connect Plex

Trying to connect plex through the sonarr notifications to let the server know there is a new file available and to trigger a scan. No matter what i do in sonarr, i get username or password incorrect. I have triple checked and cannot for the life of me get it to connect. I believe it has something to do with the reverse proxy. Any ideas where to start?

Hey, Jbarter

I believe you are using apache2? Unfortunately I do not know much about the community version exactly but the host should be external domain/ip, then port 32400 and tick use SSL.