Introduction It is possible to create M365 Groups and Teams with the same name, and there is currently no built-in way to prevent this. The new Team/Site/M365 Group is created with a random number appended to the Team name for the SharePoint site and m365 Group email address. Having duplicate names can cause confusion and increase risks, including: Wrongly Granting Permissions: Users may accidentally grant permissions to the wrong M365 Group or Team, leading to unauthorized access.

Introduction Managing the lifecycle of Microsoft 365 Groups is important to prevent accidental deletion of M365 Groups. It is a good practice to set lifecycle expiration policy to control sprawl. However that means that the group will get automatically deleted after they expire. The Teams/M365 groups owners will get email notifications to renew within a certain timeframe , however if the owners missed the renewal notifications for different reasons, it may lead to accidental data loss.