Hi Victor, Emailgistics is a complete solution for helping teams manage shared mailboxes. What makes us unique is that we do this right inside of M365. One of the services we provide is tracking which users are replying to each of the messages in an M365 shared mailbox for both auditing and reporting purposes. We want to be able to do this exclusively using our Graph integration. That integration however, is limited by the capabilities exposed by Graph. Missing from Graph is any information on which user is performing an action on a message in a shared mailbox (this includes replying, deleting, etc.) We've created workarounds for this (our add-in in combination with BCC'ing) and our solution works very well, but it would be greatly simplified if Microsoft added the basic actor information to the Graph for shared mailbox messages. Hence this request.
In order to determine the user who sent a shared mailbox message, we suggest adding a property of sent messages indicating the user who sent it as a delegate; e.g., message.delegateSender or message....