Add a mailbox to Outlook

Overview

How to add a shared mailbox to the Outlook Desktop app and Send from that email address. 

The Windows desktop version of Outlook has two versions, Classic or New Outlook.
A button in the top right shows if new Outlook is on or off 

Add a mailbox to Classic Outlook

1. Open Outlook, select File > Account Settings > Account Settings.
   
   
    
2. Select your email address
3. Click the Change button...
   
   
    
4. Click More Settings... >  the Advanced tab > the Add button
5. Enter the email address of the shared mailbox (offcampus@central.edu) and click OK.
6. Click Apply > OK > Next > Finish > Close
7. The shared mailbox should show up on the left side of the screen. Expand the mailbox to view its contents.

1. Open a new email in Outlook
2. When the new message window opens, select the Options tab at the top
3. Click on the From option.
4. A "From" button will show up in the new message window above the "To" 
5. Click on that "From" button and select "Other Email Address"
6. enter the email address (offcampus@central.edu) and hit OK
7. You should now be able to switch between sending from your personal account, and the second account by clicking on the "From" button