We use both Teams(with RealConnect) and Sfb in our enviornment. I read from http://blog.schertz.name/2019/10/poly-group-series-with-microsoft-teams/
that if running on mixed mode(Teams+Sfb), you need to set the dialing preference to IP H.323 as 1. When I do this and join a Sfb meeting, it just dials the conference ID of the Sfb invite then fails. Once I change it back to SIP->IP H.323, it dials the correct SIP address and joins the meeting successfully. What should be the correct setting?
RealConnect from the Group Series point of view is always a H323 call. When you dial sip, are you actually landing on the RMX?