MS Teams Phone Number Assignment and Usage Location

Hi,
Yes, it is possible to assign numbers from a different country if you are using direct routing numbers. Operator Connect and Calling plans requires that the user have the same usage location as the number. I guess that you are using Direct Routing.

If you call a phone number including the country code, ex +14258676537 it should work. But since you are calling from a German number, it could be that international calls are blocked so try with a German number instead, ex. +496986799799.

It could also be a number normalization issue. If the usage location for your user is US and the phone number is German (+49) and the user calls a German number with out a country prefix, and you have not assigned a German Dial Plan. Then Teams will add the country prefix for USA (based on the Usage Location of the User). If your user calls Lufthansa in Germany (06986799799) then Teams will add +1 (for USA) and call +16986799799, and that is not correct.

In the Usage Reports in Teams Admin Center you should be able to see the call, if you find it there check the Final SIP code, it should give a hint of what was the issue.