SharedMailbox members (mailbox permissions) via Graph API
We are trying to get the members (mailbox permissions) of a SharedMailbox via Graph API. We do not see any Graph endpoint at the moment that can help us get this information. We are in the process of building a custom application where we need to be able to perform read and write operations of SharedMailbox membership/permissions. This functionality is certainly available via the exchange online powershell and I can imagine this being a critical functionality which is not yet available in Graph API. .
Prashant Pratap Singh commented
try this :