1. Go to your iPhone or iPad's Settings > scroll down and tap Accounts & Passwords > Add Account.
    Note: If you're on iOS 10, go to Mail > Accounts >Add Account.

    Device Settings > Accounts & Passwords

    Tap "Add Account"

  2. Select Exchange.

    Choose Exchange

  3. Enter your Office 365, Exchange, or Outlook.com email address and a description of your account. Tap Next.

    Exchange Sign In

    Tap Sign In.

    Tap Sign In if using O365 or tap Configure Manually if you have your organization's server settings.

    Note: Tap Configure manually if you need to enter server settings.

  4. Enter the password associated with your email account. Tap Sign in or Next.

    Enter your O365 work or school account password.

  5. The Mail app may request certain permissions. Tap Accept.

    Tap Allow if prompted to give permission.

  6. Choose the services you want to sync with your iOS device and tap Save. You're done!

    Account sync settings