When customers invite participants by phone number to join audio(particularly international numbers), it will show "Inviting" in Virtual Meetings but the recipient reports that their phone does not ring.
Virtual Meetings/Invite by phone
Possible workaround are inviting participants via email or obtaining a local virtual number and pointing it to the Meetings service.
There is a known limitation with Virtual Meetings dialing out to certain regions. Currently Virtual Meetings is only allowed to dial out to these regions: