Exchange Online: Desktop Client Setup

Once an Exchange Online account has been set up, it can be accessed from a desktop or laptop computer, tablet, or smartphone. Microsoft Outlook is available for most computers and devices.

Exchange Online: Configure Outlook for Windows

  1. Start Outlook. The New Profile wizard opens.
  2. Type a name for your Profile. Click OK.
  3. If it does not automatically populate, type your UD email address (
  4. Click Advanced options, and check the "Let me set up my account manually" checkbox.
  5. Click Connect.
  6. Choose Office 365.
  7. When prompted, log into your Exchange account. Your user name is your full UD email address, and your password is your UDelNet password. You will need to approve MFA or provide your MFA code.
  8. If Prompted, click Yes to allow this organization to manage the account.
  9. After Outlook configures your account, click Done.
  10. Outlook opens.
  11. Leave the Use Cached Exchange Mode box checked.
  12. Drag the Download email for the past slider all the way to the right so that it is set to AllIf you are running low on hard drive space, leave this setting at its default (1 year). 
  13. Click Next.
  14. Click Done.
  15. Close the web brower window that opens. 
  16. Outlook opens and is ready for use.

Exchange Online: Configure Outlook 2016 for macOS

  1. After installing Office 2016, open Outlook from the Applications folder. If prompted, install any updates before continuing.

    If Outlook opens directly to email instead of going to set up wizard, follow these steps:

    • Go to the Tools menu.
    • Click the (+) sign.
    • Choose New Account.
    • Proceed to step 5 below.
  2. Click Get started.
  3. Choose your theme, then click Continue.
  4. Click Start Using Outlook.
  5. Enter your UD email address.
  6. If you see the Gmail logo, click Not Gmail.
  7. Click Office365.
  8. Enter your UDelNet password, and click Sign in. When prompted, authenticate with Microsoft MFA. You may be prompted to log in again. Type your full UD email address in the User name field, and type your UDelNet password. Checking the Remember this password in my keychain box is optional. Click OK.
  9. Click Done.
  10. Close the accounts window. Outlook is ready to use.

Exchange Online: Configure macOS mail

  1. Start Mac Mail by selecting Mail from the dock or Applications Folder
  2. Choose Exchange from the list of Mail account providers, and then click Continue. Note: If you currently use Mac Mail with other email accounts, you will need to go to the Mail menu, and choose Accounts before you can choose Exchange.
  3. Type in your name, your UD email address, your UDelNet password, and then click Sign In.
  4. An Unable to verify account name or password message appears. Verify your full UD email address appears in the Email Address field, and type your full UD email address in the User Name field. (e.g. in the Email Address and User Name fields.
  5. Erase everything in the Password field, and type your app password. An app password is different from your UDelNet password, and can be created using these instructions. If the window you see has Internal URL and External URL fields, skip to step g.
  6. Click Sign In. Server fields appear.
  7. Type in the Internal URL and external URL fields. The email Address and User Name fields should be set to your full email address. Type your app password. An app password is different from your UDelNet password, and can be created using these instructions.
  8. Click Sign In.
  9. Choose the apps that you want to synchronize with your Exchange Online account, and click Done.
  10. If it is still open, close the Internet Accounts window.
  11. Mac Mail is now ready to use. It may take time before all your email and calendar appointments appear.

Log in to Outlook on the Web (OWA)

Web access to your account is available from a Web browser on any device. Point the browser at and log in with your UD email address and password.


Configure Mozilla Thunderbird

Set Default Program
Choose Default Email Address


  1. After you have installed Mozilla Thunderbird, open it.
  2. Clear the Always perform this check when starting Thunderbird checkbox.
  3. If you want, click Set as Default to make Thunderbird your default email program. Otherwise, click Skip Integration.
  4. Click Skip this and use my existing email.
  5. Type your full name, your UD email address, and provide an App password. Your App password is different from your UDelNet password, and can be created using these directions.
  6. Mark the Remember password checkbox, and then click Continue.
  7. Change the settings so that Thunderbird detects your Exchange Online account.
    Gmail Account Detected


    1. Click Manual config.
    2. Make sure the server settings are as follows:
      Incoming mail server: IMAP
      Server hostname:
      Port: 993
      SSL: SSL/TLS
      Authentication: Normal password
      Username: UD email address


      Outgoing mail server: SMTP
      Server hostname:
      Port: 587
      Authentication: Normal password
      Username: UD email address
    3. Click Done. Thunderbird Exchange Online Servers
  8. Mozilla Thunderbird opens and is ready to use.

Troubleshoot Mozilla Thunderbird

If Thunderbird does not work as expected after configuration, you can check your settings by choosing Options – Account Settings.

Open Account Settings 

Show missing folders

If some of your folders appear to be missing, click your email address with the right mouse button, and choose Subscribe.

Subscribe to Folders
Check the boxes beside the folders you want to see, and then click OK. Folder List