Outlook doesn't display DLP policy tips for PDF attachments in Windows 7

Applies to: Outlook 2016Outlook 2013Outlook for Office 365


You're running Microsoft Outlook 2016 or Outlook 2013 on Windows 7. You attach a PDF file to an email message that should trigger a Data Loss Prevention (DLP) policy tip. However, no policy tip is displayed in Outlook.


This issue can occur if version 10 or later of Adobe PDF iFilter (AcroIF.dll) is installed.


Follow the steps in this section carefully. Serious problems might occur if you modify the registry incorrectly. Before you modify it, back up the registry for restoration in case problems occur.

To resolve this problem, use one of the following methods:

Method 1: Upgrade to a later version of Windows, such as Windows 10.

Method 2: Try another third-party iFilter.

Possible third-party alternatives are Foxit and Tracker. The third-party iFilter must be the same bitness as Office.

If you use a third-party iFilter, add the TecDisableHardMemoryLimit subkey to the registry. To do this, follow these steps: 
  1. Exit Outlook.
  2. Start Registry Editor. To do this in Windows 7, click Start, type regedit.exe in the search box, and then press Enter.
  3. Locate and then click the following registry subkey, where the x.0 placeholder represents your version of Office (16.0 = Office 2016, 15.0 = Office 2013).
    Note If the PolicyNudges subkey doesn't exist, create it.
  4. On the Edit menu, point to New, and then click DWORD Value.
  5. Type TecDisableHardMemoryLimit, and then press Enter.
  6. Right-click TecDisableHardMemoryLimit, and then click Modify.
  7. In the Value data box, type 1, and then click OK.
  8. Exit Registry Editor.

More Information

For more information about Foxit iFilter, see http://www.foxitsoftware.com/products/ifilter/.
For more information about Tracker iFilter, see https://www.tracker-software.com/shell_ext.html.

The third-party products that are discussed in this article are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, regarding the performance or reliability of these products. 

Microsoft provides third-party contact information to help you find technical support. This contact information may change without notice. Microsoft does not guarantee the accuracy of this third-party contact information.