Office 365 & Apple Mail: Add Account to iPhone

Creation date: 3/5/2025 5:01 PM    Updated: 3/27/2025 10:13 AM   apple ios mail office365
Before starting, ensure you have your Office 365 login credentials and can complete Duo authentication. 

These steps are verified on iOS 18.3.1.

To add your @cshl.edu email account to Apple's Mail app, following these steps:

  • Open Settings
      • Go to Settings > Apps > Mail, then tap Mail Accounts.
      • Make sure the account is removed before proceeding. Select the existing account, and select Delete Account, then Delete from iPhone.
  • Add an Account
      • Tap Add Account, then select Microsoft Exchange.
      • Enter Email Details – Type in your @cshl.edu email address and add a description for your account. Tap Next.
      • When prompted with "Sign in to your 'cshl.edu' Exchange account...", tap Sign In.
      • On the next pop-up, "Settings Wants to Use 'microsoftonline.com' to Sign In," tap Continue.
      • Complete Login & DUO Authentication.
      • A Safari window will open, prompting you to sign in.
      • Enter your email and password, then complete Duo authentication.
      • After authentication, Safari will close, and you’ll return to the Mail setup screen.
  • Configure Sync Settings
      • Choose which data to sync (Mail, Contacts, Calendars, etc.),
      • Tap Save in the top-right corner.
  • Verify Setup – Open the Mail app and confirm that your inbox loads successfully.