Email - Shared Mailbox on iOS

Adding a Shared Mailbox on your iOS device (iPhone, iPad)

Summary

How to add a Shared Mailbox on your iOS device (iPhone, iPad)

Step-by-step

1. Go to Settings > Mail > Add account  (in iOS 11 go to Settings > Accounts & Passwords > Add account).
2. Select Other from the list of types.
3. Tap Add Mail Account.
4. Enter a name for the mail account (e.g. SU Shared Mailbox)
5. Enter the email address of the shared mailbox
6. Enter the password of a mailbox that has access to the shared mailbox (e.g. your own password)
7. Enter a description for the mailbox (e.g. Shared Departmental Mailbox)
8. Tap Next.
9. Select IMAP
10. Fill in the following: 
    Under Incoming Mail Server
    Host Name: outlook.office365.com
    User Name: mailbox@domain.com
    Password: Your email’s password
    
    Under Outgoing Mail Server
    Host Name: smtp.office365.com
    User name: mailbox@domain.com
    Password: Your email’s password
11. Tap Next, then tap Save.
12. In the next screen, choose which items to sync (generally just emails)
13. Tap Save.
14. Exit Settings and start the Mail app.