Delegate is Send on Behalf, which is usually the legally required model.
For Send As, an administrator needs to grant you these permissions.
how does delegation work in Outlook
I'm set up mailbox delegation in exchange 2013 for a user.
However, how does it work in Outlook 2013... ? I'm looking for the pulldown to send but doesn't appear.
I do see two mailboxes list in the left pane under default "User3" profile, but how do i send as ???