There are many examples of PowerShell scripts which create reports about the membership of Microsoft 365 Groups. Most are slow. This version is faster because of its per-user rather than per-group approach to processing. The output is a nice HTML report and two CSV files containing a list of memberships in Microsoft 365 Groups and summary data for each user in the tenant.
Many people want to print off membership details of Microsoft 365 groups, which makes it curious why Microsoft doesn’t support the option in Teams, OWA, or other applications. Fortunately, it is very easy to extract and report membership with PowerShell. Here’s how to generate a HTML report with a CSV file on the side.