Unlike email systems, Microsoft Teams doesn’t support user delegation, or assigning the right for someone to act on behafl of someone else. Here’s how to workaround some of the issues involved in helping managers and their assistants work effectively together, including personal chat, channel messages, and scheduling calendar meetings.
You can configure Send As and Send on Behalf of permissions to allow Exchange Online users to send messages for an Office 365 Group. All is well if the messages arrive, but if they don’t, the NDRs might not get to where you think they should go, such as a folder in the Recoverable Items structure. That’s OK if the sender was told that a problem exists with a message, but they don’t know anything happened.