A Shared Mailbox is an email address that multiple people can log into and manage. While the mailbox has its own password, users with access to the shared mailbox will log in using their personal credentials. Shared mailboxes are visible on the left hand side of Outlook and users can choose to send emails directly from the shared mailbox as opposed to themselves. Permission must be received from someone who already has access to that mailbox before a user can access it.

A Distribution Group is an email address that, when sent to, delivers the message to multiple recipients' inboxes. Distribution lists do not appear on Outlook as shared mailboxes do and serve only to send emails to a large amount of users who are part of the distribution group.