Outlook search folders show unexpected mail items with an empty subject

Summary

When you create a search folder for all mail items in Outlook 2013, Outlook 2016, Outlook 2019 or Outlook for Office 365, the folder may include unexpected items with a blank subject. If you move the mouse over these items, the following information is displayed:

In folder: PersonMetadata

More Information

The PersonMetadata folder is created and used by the Outlook Customer Manager (OCM). The folder is normally hidden from other parts of the Outlook user interface. However, search folders include mail items from this folder.

Although these items have a blank subject, they are actively used by OCM and should not be deleted or modified. It is a search folder limitation to include mail items from hidden folders.

Use the following workaround to avoid including mail items from hidden folders in your search results.

  1. Right-click the Search Folder, and click Customize This Search Folder.
  2. Click Browse, and deselect the Search Subfolders option.
  3. Manually select the folders you wish to include.