It's not officially published yet, but you can query the Teams usage report via the Graph now: https://www.michev.info/Blog/Post/3805/at-long-last-teams-usage-reports-are-available-via-the-graph-api
API to get last activity date in all Teams
Robin Couvreur
26
Reputation points
Hello everyone,
I am looking for a way to display all the teams in a tenant with details (including last activity date, membercount, etc.) in Graph.
Hope someone can help.