Assigning numbers fails with "Sorry, but we couldn't save your changes. Please try again later."
- Correct licenses are assigned. Need "Cloud PBX" from E5 as well as a "Calling Plan" license. If the license is correct the the users should show up in the "Voice users" view.
- Check the Location assigned to the user. It has to match up with the “Emergency Location” when assigning the telephone number. You can find the Location in the main Admin portal where you assign licenses to users.
|In main O365 Admin portal > Users > Product Licenses|