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Default folder is missing in Outlook and Outlook on the web

In Microsoft Outlook and in Outlook on the web, you may find that a folder appears to be missing from your mailbox.
This behavior can occur if the PR_ATTR_HIDDEN property of the affected folder is set to True. The default value for the PR_ATTR_HIDDEN property for mailbox folders is False.
Use the steps below to confirm that you are facing this issue, and to reset the PR_ATTR_HIDDEN property of the affected folder.

  1. Download and extract the MFCMAPI tool from
  2. Launch mfcmapi.exe and click OK through the intro screen.
  3. On the Session menu, click Logon.
  4. Select the Outlook profile for the affected mailbox, and click OK.
  5. Double-click the email address which represents the desired mailbox.
  6. In the left pane, navigate to the affected folder using the appropriate steps below for the type of Outlook profile you are using.

    Cached Mode
    1. Expand Root - Mailbox
    2. Expand IPM_SUBTREE

    Online Mode

    1. Expand Root Container
    2. Expand Top of information Store
  7. Locate and select the folder that appears missing in Outlook, and check the value of the PR_ATTR_HIDDEN to determine if it is set to True, as shown in the following figure:

  8. If PR_ATTR_HIDDEN shows a value of True, right-click the PR_ATTR_HIDDEN property and select Edit Property.
  9. Uncheck the Boolean checkbox and click OK.
  10. Close all MFCMAPI windows, and restart Outlook.

More information
While you are looking at the folder properties you should also check PR_ATTR_SYSTEM. Its default value is also False, so if you find it currently set to True, after completing steps 1 through 9 above, you should change this value as well, using the additional steps below.
  1. If PR_ATTR_SYSTEM shows a value of True, right-click the PR_ATTR_SYSTEM property and select Edit Property.
  2. Uncheck the Boolean checkbox and click OK.
  3. Close all MFCMAPI windows, and restart Outlook.

Note This is a "FAST PUBLISH" article created directly from within the Microsoft support organization. The information contained herein is provided as-is in response to emerging issues. As a result of the speed in making it available, the materials may include typographical errors and may be revised at any time without notice. See Terms of Use for other considerations.

Article ID: 2992093 - Last Review: 09/28/2016 00:01:00 - Revision: 8.0

Outlook 2016, Microsoft Outlook 2013, Microsoft Outlook 2010, Microsoft Exchange Online, Exchange Server 2016 Enterprise Edition, Exchange Server 2016 Standard Edition, Microsoft Exchange Server 2013 Enterprise, Microsoft Exchange Server 2013 Standard, Microsoft Exchange Server 2010 Enterprise, Microsoft Exchange Server 2010 Standard

  • o365 KB2992093