I believe that the key from your registry file:
[HKEY_CURRENT_USER\Software\Wow6432Node\Microsoft\Office\15.0\Excel\Resiliency\AddinList]
should be
[HKEY_CURRENT_USER\Software\Policies\Microsoft\Office\15.0\Excel\Resiliency\AddinList]
If I read the documentation correctly ![]()
The rest of the configuration in the registry file seems correct.