Teams invitation, from Teams app vs Calendar forward

I am still facing this same issue

I can confirm it works... we have the exact same setup.
First question... what license are you using for the Dedicated Room Mailbox? We use an Intune license, and F3 license to save on cost.

Yes, our X50 has the latest firmware. Our only issue right now is when we forward an invite that was sent to a personal email, to the boardroom, outlook again breaks the join info. Microsoft had fixed it, but it is broken again. If you forward the invite via the outlook web access though, that works. But we've never had an issue joining an external meeting where it was sent directly to the boardroom. If you want... I can send you a test meeting invite to your boardroom, and you can send a test meeting invite to my boardroom if you want to test it out. If you want to do this... I suggest you set up a temporary email address and redirect it to the real boardroom email address so that you don't give your real boardroom address to the forum trolls.

We're still experiencing an issue that appears related - Teams mode on a Poly X50, X50 has its own dedicated Room mailbox to which meeting invitations are sent. Meeting invitations within the Tenant work, meeting invitations from external tenants appear on the X50 but cannot be joined. X50 is running latest firmware and latest Teams application?

Hi - We are having the same issue.
Has there been any solution for this?

Thanks,
Ian