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How to access shared Exchange On-Premise mailboxes after migration to Exchange Online

It is possible to access shared mailboxes on Exchange On-Premise, provided that you have Full Access to the mailbox with your original domain logon account [e.g. internal\CRSid for the ACN]. The process requires you to add the shared mailboxes as additional accounts to your Outlook client, as follows

These instructions are also available in PDF format >

  1. Close Outlook.

  2. From the Start menu, open the Control Panel.

  3. Click Mail:

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  4. Click the Show Profiles button:

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  5. In the Profiles list, hilight the profile that connects to your Exchange Online mailbox and click the Properties button:

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  6. Click the E-Mail Accounts button:

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  7. Highlight your Exchange Online mail account and click the New button:

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  8. Select the E-Mail Account radio button and click the Next button:

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  9. Select the Manually configure server settings or additional server types radio button, and click Next:

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  10. Select the Microsoft Exchange or compatible service radio button and click Next:

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  11. Enter the following:

    a.    Server: lucifertwo.internal.admin.cam.ac.uk
    b.    Untick the Use Cached Exchange Mode checkbox
    c.    User Name: enter the full, primary email address of the shared mailbox, e.g. servicedesk@uis.cam.ac.uk

    Click the Check Name button to confirm the mailbox can be found. It will underline the entries if it finds it successfully.  

    Note: If it fails to resolve, you may need to ask the Service Desk to confirm the mailbox is not hidden. 
    Once the mailbox has resolved successfully, click the Next button:

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  12. Click the Finish button:

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  13. Click the Close button:

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  14. Click the Close button:

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  15. Click the OK button:

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  16. Open Outlook.

  17. If prompted at any point for credentials for this newly-added account, please use your local logon details, (e.g. for the administrative computing network (ACN), this would be INTERNAL\CRSid) and click OK:

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  18. Outlook should now display the shared mailbox in the viewing pane to the left of the screen.