Teams conference number added to all teams invite

Hi mahesh1915, that won't work what you are trying to setup. When you assign the dial in license to a user, the user cannot copy the dialin information from a new blank meeting to the existing meetings. That's why you get the error information.

Each meeting gets a unique conference ID which is used for the dial in process.

I'm not sure what happens when you schedule a Teams Meeting and assign a dial in license to the user afterwards. Maybe you just need to open the existing Teams meeting and send an update with the dial-in information added.

If not, the user needs to renew the existing Teams meetings by canceling the existing meetings and set up new meetings with the same attendees.

Best regards,

Thorsten