Active Directory Connection for User Auth


I have a working rocketchat server and am wanting to setup auth against my windows server active directory. I have Nextcloud working to auth against the AD, so I know it works. I have setup the server in Rocketchat and I can get a successfull connection test, but I can’t get a successful user search test.

What are the settings one should use for Base DN and Filter for Active Directory?

THank you