There are certain scenario’s where you want to enable Outlook add-ins only for specific users. This guide explains how to accomplish this by using the group policy.
1. Open the registry and navigate to: HKCU\Software\Microsoft\Office\Outlook\Addins
2. Find the corresponding key which matches the Outlook add-in you have installed (for example: HKCU\Software\Microsoft\Office\Outlook\Addins\OcOffice.OcForms)
3. Right-click on the key and choose “Copy Key Name”
In every subkey you will find a registry value “LoadBehavior”. By default it has the value “3”. Every value is explained here: http://msdn.microsoft.com/en-us/library/vstudio/bb386106.aspx#LoadBehavior