Mary wants a copy so Rob manually copies messages he's sent on her behalf from his Sent Items folder to her Sent Item folder. Messages that Rob sends on behalf of Mary are stored in his Sent Items folder. This allows him to see what's on her calendar schedule, accept, and decline meeting requests and respond to messages. To help Mary, Rob's been granted delegated access to Mary's mailbox and to send messages on her behalf. She has an extremely busy schedule and has Rob, her executive assistant, to help manage her calendar. Mary is the Vice President of Global Sales. Let's take a look at a quick example of how this would work in real life: You can use this article to change this behavior so that the sent message is stored in both the assistant and manager's Sent Items folders. By default, when an assistant sends mail as, or on behalf of, a manager, the sent message is stored in the assistant's Sent Items folder. People often set up delegated access and send permissions to allow an assistant to manage a manager's calendar where they need to send and respond to meeting requests. When an assistant is granted access to a manager's mailbox, it's called delegated access.

We'll call them 'assistant' and 'manager' for simplicity's sake. These people are often called the delegate and the delegator, respectively. Mailboxes in Microsoft 365 or Office 365 can be set up so that someone (such as an executive assistant) can access the mailbox of another person (such as a manager) and send mail as them.

Outlook 2016 send as another user