Applies to: 

Call2Teams - Customers


When entering phone numbers against a user, the error "The telephone number provided is not valid " is seen:


This is because the number should be in E.164 format, in order to be mapped to Microsoft Teams.

E.164 is the international telephone number format: [+][Country code][Subscriber number]


Ensure the phone number entered is in a compatible format.

Example: +4412341234567

See this article for more information about E.164 format: