I had a facilitator join through the LMS to facilitate a session.  The session used the integrated TEAMS account, and the facilitator was using the latest updated version of TEAMS.  

When joining, she was given an error message asking ‘Did you mean to open this in the old TEAMS?’ and she could not proceed until she reverted back to the previous version.

I am going to attempt to reproduce the scenario, curious if this has happened to anyone else?