This article explains how to use PowerShell to create dynamic Microsoft 365 groups (and teams) based on the departments assigned to Entra ID user accounts. Creating a new group is easy. The trick in team-enablement is to wait for the synchronization between Entra ID and Teams to finish before you go ahead. After that, it’s plain sailing.
https://office365itpros.com/2023/10/10/dynamic-microsoft-365-groups/