The following settings appear on the Advanced tab:
| Setting | Description |
|---|---|
| Send As | Sends the email as another user or shared mailbox. Under AzureAD, this requires the delegated Mail.Send.Shared permission. Under the app-only schemes, it requires the Mail.Send application permission plus Send As rights granted on the target mailbox by an Exchange administrator. |
| Send On Behalf Of | Sends the email on behalf of another user. Recipients see both the sender and the mailbox the message was sent from. |