Configure iPhone/IMAP Access to a Shared Mailbox – Office 365

These instructions are specifically for setting up access to a Office 365 shared mailbox on an iPhone but the settings could possibly be used to configure any IMAP mail client.

  • Settings app → Mail → Accounts → Add Account → Other → Add Mail Account
  • The settings at this screen don’t matter much. We’ll put the correct ones in the next screen. Fill it out and tap Next
    • Name:  User’s name
    • Email:  Email address of the shared mailbox
    • Password:  Password associated with the user’s primary mailbox
    • Description:  This is how the mailbox will be labeled in the Mail app
  • At the next screen, we need to get a lot of settings right.
    • Name:  User’s name of shared mailbox name. This will be what a recipient sees for the “From” display name in their mail client when they receive a message from the shared mailbox
    • Email:  Email address of the shared mailbox
    • Description:  This is how the mailbox will be labeled in the Mail app

      Incoming Mail Server
    • Host Name: outlook.office365.com
    • Username:  primarymailbox@primarydomain.com\alias_of_shared_mailbox
      (The alias of the shared mailbox can be found in through Exchange Admin Center → Recipients → Shared → Double-click on the shared mailbox and its in the General tab. Note that the alias is often the first part of the email address but isn’t always! You need to check.)
    • Password:  Password associated with the user’s primary mailbox

      Outgoing Mail Server
    • Host Name:  smtp.office365.com
    • Username: primarymailbox@primarydomain.com
      (Note that this is different than incoming mail server settings!)
    • Password:  Password associated with the user’s primary mailbox.
  • Next. Should be self-explanatory from here. Check with the end-user that they can open the Inbox of the shared account in the Mail app.

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