OL2000: Add-in Features Missing in "Trusted Sources" Window (208341)


The information in this article applies to:

  • Microsoft Outlook 2000
This article was previously published under Q208341
IMPORTANT: This article contains information about modifying the registry. Before you modify the registry, make sure to back it up and make sure that you understand how to restore the registry if a problem occurs. For information about how to back up, restore, and edit the registry, click the following article number to view the article in the Microsoft Knowledge Base:

256986 Description of the Microsoft Windows Registry

SUMMARY

In other Office programs you can use the Trusted Sources tab to turn off, Trust all installed add-ins and templates. Outlook does not have this setting, but it is possible to get this same functionality.

MORE INFORMATION

While Outlook does not provide a means to change this setting through the user interface, you can edit the Windows registry to force Outlook to not trust add-ins. For this registry setting to work, you must set the security level to Medium or High, on the Security Level tab, of the Security dialog box. If the security level is set to Low, you will not be warned about add-ins.

Like the other Office programs, the Outlook default setting is to have Trust all installed add-ins and templates turned on. Unless you specifically have a reason to change this setting, you should not make this change.

WARNING: If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that you can solve problems that result from using Registry Editor incorrectly. Use Registry Editor at your own risk.


To change the add-ins security setting, follow these steps:
  1. Quit all running programs.
  2. Click Start, and click Run.
  3. In the Open box, type regedit and then click OK.
  4. In the Registry Editor, open the following registry key:

    HKEY_CURRENT_USER\Software\Microsoft\Office\9.0\Outlook\Security

    If an entry exists in the right pane named DontTrustInstalledFiles, skip to Step 7. Use steps 5-6 only when you are adding the DontTrustInstalledFiles key to the registry.
  5. With the Security key selected, on the Edit menu, point to New and then click DWORD Value. This inserts a new option named New Value #1.
  6. In the right pane of the Registry editor, do either of the following:
    • If New Value #1 is selected
      1. Press DELETE to delete the option name, New Value #1.
      2. Type DontTrustInstalledFiles, and then press ENTER. This renames the new option to the correct DontTrustInstalledFiles name.
    • If New Value #1 is not selected
      1. Click to select New Value #1.
      2. On the Edit menu, click Rename.
      3. Type DontTrustInstalledFiles, and then press ENTER. This renames the new option to the correct DontTrustInstalledFiles name.
  7. With DontTrustInstalledFiles selected, on the Edit menu, click Modify.
  8. In the Value Data box, type 1. This setting forces Outlook to display a security warning when using COM add-ins.
Another difference in the Trusted Sources tab is that the other Office programs display text indicating whether or not a virus checker is currently installed. Outlook does not provide this notice.

REFERENCES

For additional information about available resources and answers to commonly asked questions about Microsoft Outlook 2000 solutions, please see the following article in the Microsoft Knowledge Base:

146636 OL2000: Questions About Custom Forms and Outlook Solutions

Modification Type:MajorLast Reviewed:9/29/2003
Keywords:kbhowto kbnofix KB208341
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