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Set up Apple Mail in Mac OS X 10.11 (El Capitan)

How to set up your Exchange Online account in Apple's native Mail application, in Mac OS X 10.11 (El Capitan). Note that there is also a set-up wizard available to do this for you – see the Email Set-up Wizards section (link at foot of this page).

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Before you start: If you have never done so, sync your UIS Password to the Blue Active Directory by running through the Change Password procedure using the UIS Password Management application at You can keep using your current password – the important part is that you run through the process one time only in order to trigger the sync with Blue, and then onwards to Azure, Microsoft’s Active Directory which ultimately controls your access to Exchange Online services. It may take up to 3 hours for your password to sync to Azure. You can’t complete the Exchange Online configuration until your UIS Password has synced with Azure, and will get error messages when you try to log in. These errors will stop once your password has synced.

  1. Open the Mail application.

  2. Mail > Add Account...    


  3. Choose Exchange and click Continue:


  4. Fill in your Name.
    Your Email Address is your
    Your Password is your UIS Password.
    Click Sign In:


  5. This will generate an error alert:


    You will need to add the server information, and complete the other fields, as follows:
    The Email Address will be auto-filled with your address, but you will need to add your User Name (
    Set both the Internal and External URL to
    Click Sign In:


  6.  When Mail has connected the Exchange server, you will have the chance to choose which apps you would like to use with your new account.
    Click Done to finish:


  7. You will now see your new Exchange mailbox listed in your Mail window:


  8. To edit the display name of your new Exchange Online account, go to Mail > Accounts.

  9. Click the new mailbox name to select it, and click the Details button to open the editing dialog box:


  10. Enter a Description (e.g. Exchange) which will be used as the display name for your mailbox.
    Click OK to save: