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Knowledgebase: Resource Central
KB0043 - Outlook 2013 and 2016 may load add-in slowly



When starting Outlook 2013 or Outlook 2016, this information bar might be displayed saying “A problem was detected with an add-in and it has been disabled”:

Clicking on the “View Disabled Add-ins…” button shows a form with the list of add-in as well as how each add-in impact Outlook performance:

Sometimes even if you put the add-in into the “Always enable this add-in” list, it is still flagged as “Inactive” even with a reboot of Outlook.

It may be see that the outlook splash screen stops at loading add-ins, and Outlook is automatically closed after that. Another variant is that Outlook may keep on loading add-ins, but it Outlook never completes loading.



Outlook 2013 and Outlook 2016are less tolerant to long add-in load time compared to earlier Outlook revisions.



Option 1: Temporary solution: Click on “Always enable this add-in”

Option 2: Create a registry key to force Outlook to never disable RC Add-in:

             - Open Registry Editor

             - Go to this key:

               + Outlook 2013: HKEY_CURRENT_USER\Software\Microsoft\Office\15.0\Outlook\Resiliency\DoNotDisableAddinList

               + Outlook 2016: HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Outlook\Resiliency\DoNotDisableAddinList

             - Create a key (right click ⇒ New ⇒ DWORD (32-bit) Value) with name based on the backend and Outlook versions:

  • RC 3.7 and 3.7.10 revisions (32-bit Outlook): ResourceFinder.Connect
  • RC 3.8, RC 3.7 and 3.7.10 revisions (64-bit Outlook): Add-On-Products.ResourceFinder
  • New Add-in version 4.0 (both 32-bit and 64-bit): AOP.RC.ResourceFinder.Addin

             - Right click on the created key, select [Modify] and enter “1” into Value data field:

Figure 1 - RC 3.7 and RC 3.7.10 (32-bit Outlook)

Figure 2 - RC 3.8

Figure 3 - RC 3.7 and RC 3.7.10 (64-bit Outlook)

Figure 4 - New Add-in 4.0 

             - Click [OK] to finish.


Option 3: Disable Certificates for publisher and server on the client PC

Open Internet Explorer, go to Settings  Internet Options, select Advanced tab, and move to Security section.

Uncheck 2 options highlighted in the screenshot:

             - Check for publisher’s certificate revocation

             - Check for server certificate revocation ( requires restart)

Option 4: Disable Client Certificate Revocation (CRL) check on IIS

Please refer to this article for more details.



Applies toRC 3.7, RC 3.7.10, RC 3.8, RC 4.0

Reference: TFS #5940; 28910; 18757

Knowledge base ID: 0043

Last updated: May 09, 2016