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Overview
How to add a shared mailbox to the Outlook on Mac and send from that email address.
Outlook for Mac also has two versions: Classic Outlook and New Outlook.
You can switch versions or verify which version you are using by selecting your profile picture in the top corner of Outlook and checking the toggle for New Outlook.
Add a mailbox to Classic Outlook for Mac
- Open Outlook on your Mac.
- Select Tools from the menu bar and choose Accounts.
- Choose your main email account from the left column.
- Select Advanced.
- Open the Delegates tab.
- Under People I am a delegate for, click the + button.
- Enter the shared mailbox address (offcampus@central.edu) and select Add.
- Click OK to close the Advanced settings, and close the Accounts window.
- The shared mailbox will now appear in the left sidebar. Expand it to view its folders.
Add a shared mailbox in New Outlook for Mac
- Open Outlook for Mac.
- Select Settings (gear icon) in the bottom left corner.

- Choose Accounts.
- Select your primary email account.
- Click Delegate & Sharing.
- Under Shared with me, click the + button.
- Enter the shared mailbox address (offcampus@central.edu) and select Add.
- The shared mailbox will appear in your folder list on the left side of Outlook.
Send From another account (Mac)
- Open a new email in Outlook.
- Select Options at the top of the new message window.
- Enable the From button.
- Click the From dropdown that appears above the “To” field.
- Choose Other Email Address.
- Enter the shared address (offcampus@central.edu) and click OK.
- You can now switch between sending from your personal account and the shared mailbox using the From dropdown.