How to Hide the Clutter Folder for Office 2016

MFCMAPI

In order to hide the Clutter folder you’ll need to make use of MFCMAPI. This is because hiding a folder isn’t a default feature within Outlook.

MFCMAPI is a low-level editing tool to access your mailbox data. You can do some really great things with it, but you can also easily do large irreversible damage to your mailbox so it is important that you make a backup first and follow the below instructions carefully.

You can download MFCMAPI from Microsoft’s Open Source Website CodePlex. When you are using the 64-bit version of Outlook, make sure you download the MFCMAPI 64-bit executable version instead.

Hide the Clutter folder with MFCMAPI

To hide the Clutter folder, use the following steps:

1. Open MFCMAPI.
2. Accept any dialog prompts to get to the main window of MFCMAPI.
3. Choose: Session-> Logon…

Click on image to enlarge.

4. Select the mail profile that contains the mailbox with the Clutter folder.
   If you are unfamiliar with this dialog, simply press OK.

5. In the top-part of MFCMAPI you should now see all your configured mailboxes and connected pst-files. Double click on the the mailbox which contains the Clutter folder that you wish to hide.
6. In the Navigation Pane on the left, expand the folder list called “Root – Mailbox” or “Root Container”.
7. Expand the folder list called “Top Information Store”, “IPM_SUBTREE” or “Top of Outlook data file”.
8. Select the Clutter folder.
9. Choose: Property-> Advanced-> Edit given property…
10. In the Property Tag field type: 0x10F4000B
    This will resolve to the Property Name: PR_ATTR_HIDDEN
11. Click OK
12. A dialog will open; Enable the selection in front of Boolean to hide the folder.
13. Close all the open MFCMAPI windows.

The Clutter folder should now be hidden in Outlook.

Add the PR_ATTR_HIDDEN property to a folder to hide it (click on image to enlarge).

Unhide the Clutter folder with MFCMAPI

Unhiding the Clutter folder again is really simple;

1. Perform the same first 8 steps of the process to hide the folder.
2. Double click on the PR_ATTR_HIDDEN property.
3. Disable the selection in front of Boolean.
4. Click OK.
5. Close all the open MFCMAPI windows.

The Clutter folder should now be visible again in Outlook.

To unhide a folder, disable the selection box in front of Boolean.