Add multiple members/owners at once to a group
It sould be possible to add more then one member/owner with a single request.
Pierre Nilsson commented
You can leverage JSON Batching to achieve something similar on Group member updates. Although a single batch can only take 20 sub-requests, 10 requests are still better than 200. Docs here: https://docs.microsoft.com/en-us/graph/json-batching?context=graph%2Fapi%2F1.0&view=graph-rest-1.0
Matthias Habegger commented
It is only possible on Group creation but not on Group update.
We create a Group with e.g. 5 members and afterwards there have to be 200 members.
I have to add the members with 200 requests (https://docs.microsoft.com/en-us/graph/api/group-post-members?view=graph-rest-1.0&tabs=http).
Engman Christer (SEIT) commented
This is already possible as described here: https://docs.microsoft.com/en-us/graph/api/group-post-groups?view=graph-rest-1.0&tabs=http#request-1