Microsoft Teams may sometimes fail to add a new user to your group.
Update Teams, and if the error persists, continue the troubleshooting process with the methods below.
test whether this quick workaround solves the problem for you as well.
On the other hand, if you go toCallsContactsAdd Contact, you should add the user to your group.
Alternatively, several admins solved this problem by adding the e-mail address on the user object in AzureAD.
If youre not an admin, you should probably contact your IT admin for further help.
This usually happens if theres no Exchange license properly assigned to the respective accounts.
The admins who used this method confirmed that removing the trial license keeps the mail attribute filled.
Hopefully, this method works for you as well.
