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The Outlook Add-In loads slowly on a computer that has no Internet connection

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Exclaimer Support
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WARNING!  The following products were discontinued on 30 June 2021 and are no longer available for purchase or supported:

- Exclaimer Auto Responder

- Exclaimer Email Alias Manager for Exchange  

- Exclaimer Mail Archiver

For more information, please see the Discontinued Questions and Answers page.

Scenario 

You are using the Exclaimer Mail Archiver Outlook Add-In on a computer with Outlook 2013 that has no internet connection. You observe that the Outlook Add-In takes several seconds longer to load and you may see the following dialog from Microsoft Outlook:



Reason

The Exclaimer Mail Archiver Outlook Add-In is digitally signed by Exclaimer to verify its authenticity. This is a requirement for all Add-Ins used with Microsoft Outlook and helps protect users against viruses and unsafe Add-Ins. To verify that the certificate is authentic, your computer needs to verify that the certificate has not been revoked.
The list of revoked certificates is provided online by Microsoft and is periodically downloaded from their Internet site. However, on a computer that does not have an Internet connection, this list cannot be updated. Our tests show this causes a significant delay in loading the Add-In. Whilst this delay slows downloading Microsoft Outlook by a few seconds, it does not cause any problems to either Microsoft Outlook or the Exclaimer Mail Archiver Outlook Add-In.

Resolution

As this behaviour is controlled by Microsoft Outlook 2013, we cannot control this delay.

Here's a workaround to prevent the error dialog being presented:

If possible, temporarily connect the computer to the Internet. This will automatically download the list of revoked certificates from Microsoft. Upon completion, the following event will be recorded in the Windows Application Event Log:

Source CAPI2
Level Information
ID 4112
Detail Successful auto update of disallowed certificate list with effective date: Date
  1. Add the following Registry Key which adds the same behaviour as if the user had selected Always enable this add-in from the dialog.

    Warning: Windows Registry modifications should always be approached with extreme care - serious problems can occur if you modify the Windows registry incorrectly!

    We strongly advise you to back up the Windows registry before any modifications are made - in doing so you will have the option to restore the backup if a problem occurs.

    For more information, see How to back up and restore the registry in Windows.
  2. Launch the RegEdit (Registry Editor).

  3. Browse to the following key:

    HKEY_CURRENT_USER\Software\Microsoft\Office\15.0\Outlook\Resiliency\DoNotDisableAddinList
  4. From the Edit menu, select New then select DWORD (32-bit) Value.

  5. Enter the DWORD name as Exclaimer.MailArchiver.OutlookAddIn and press [Enter].

  6. To edit the value, you can either right-click the Exclaimer.MailArchiver.OutlookAddIn and select Modify or double-click Exclaimer.MailArchiver.OutlookAddIn.

    The Edit DWORD (32-bit) Value window is displayed.
  7. In the Value data box, type 1.

  8. Click OK to save the changes and close the window.
Note: For more information, see how the certificate revocation process works.

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