Sample Registry for Outlook Addin Fix
This is a sample registry file that fixes an issue where Outlook may disable an add-in due to perceived errors. The registry file adds the AOP.RC.ResourceFinder.Addin add-in to the Resiliency key and sets the load behavior to 3, which means the add-in should be loaded at startup.

Note: This sample registry file is provided as-is for demonstration purposes only. You must select the right registry entries based on your Outlook version, as shown below.

Selecting the Right Registry Entries
Before applying this registry file to your system, you must select the right registry entries based on your Outlook version. The registry entries are provided for Outlook 2013, 2016, 2019, and 365, as shown below:

Outlook 2013
[HKEY_CURRENT_USER\Software\Policies\Microsoft\Office\15.0\Outlook\Resiliency\AddinList]
[HKEY_CURRENT_USER\SOFTWARE\Microsoft\Office\Outlook\Addins\AOP.RC.ResourceFinder.Addin]
[HKEY_LOCAL_MACHINE\Software\Microsoft\Office\Outlook\Addins\AOP.RC.ResourceFinder.Addin]

Outlook 2016
[HKEY_CURRENT_USER\Software\Policies\Microsoft\Office\16.0\Outlook\Resiliency\AddinList]
[HKEY_CURRENT_USER\SOFTWARE\Microsoft\Office\Outlook\Addins\AOP.RC.ResourceFinder.Addin]
[HKEY_LOCAL_MACHINE\Software\Microsoft\Office\Outlook\Addins\AOP.RC.ResourceFinder.Addin]

Outlook 2019
[HKEY_CURRENT_USER\Software\Policies\Microsoft\Office\16.0\Outlook\Resiliency\AddinList]
[HKEY_CURRENT_USER\SOFTWARE\Microsoft\Office\Outlook\Addins\AOP.RC.ResourceFinder.Addin]
[HKEY_LOCAL_MACHINE\Software\Microsoft\Office\Outlook\Addins\AOP.RC.ResourceFinder.Addin]

Outlook 365
[HKEY_CURRENT_USER\Software\Policies\Microsoft\Office\16.0\Outlook\Resiliency\AddinList]
[HKEY_CURRENT_USER\SOFTWARE\Microsoft\Office\Outlook\Addins\AOP.RC.ResourceFinder.Addin]
[HKEY_LOCAL_MACHINE\Software\Microsoft\Office\Outlook\Addins\AOP.RC.ResourceFinder.Addin]

Applying the Registry Entries
To apply the registry entries to your system, follow these steps:

Open the sample registry file in a text editor (e.g. Notepad).
Select the registry entries for your Outlook version by uncommenting the relevant lines (i.e. removing the semicolon ; at the beginning of the line).
Save the modified registry file with a .reg extension (e.g. outlook-addin-fix.reg).
Double-click the saved .reg file to import the registry entries into your system.
Restart Outlook to ensure that the add-in is loaded at startup.
Note: Before applying the registry file, we recommend backing up your registry and creating a system restore point as a precaution. We are not responsible for any damages that may occur from using this sample registry file.