Shared/Proxy Access via Microsoft Outlook Client (Windows)

Owned by Andrew Molloy
Last updated: Jul 28, 2021 by Andrew Molloy
2 min read

This guide will show you how to add another mailbox to your Outlook desktop app on your Windows computer.

Note: You may need to first remove an existing shared mailbox from Outlook:

  1. Select File > Account Settings > Account Settings.


  2. On the Email tab, select the mailbox account you need to remove, then click Remove. Restart Outlook.

  3. Proceed to the steps below to add a shared mailbox.


  1. In Outlook, click File; click Add Account.
    account information

  2. In the Account Setup screen, enter the email account of the shared/proxy mailbox in the Email address field and click Connect.
    enter proxy account

  3. When prompted, click Microsoft 365. (Sometimes this step is skipped.)


  4. You will see this screen, click Sign in with another account.

  5. Enter your SU email and click Next.

  6. Enter your SU password and click Sign in. Sometimes after you complete this step, it will go back to Step 4. If that happens, click 'Sign in with another account' again, then click your account when it appears to complete the process.

  7. Verify that the setup completed with “Account successfully added”; click Done.
    verify account

    For personal device: Click No, sign in to this app only.

    Click Done

  8. Close and reopen Outlook; your shared/proxy mailbox should be on the left pane below your current.

    Tips:
    • To send an email from that account, you can click on the Inbox folder of the newly added account and then select New Email from the Outlook top pane.
    • You can also select your desired 'send from' email by clicking on the From field from any account.


    from box