CRM 2011 - Outlook offline Error : Unable to load plug-in assembly

When you start a plug-in assembly in the Microsoft Dynamics CRM 2011 client for Microsoft Office Outlook, you receive the following error message:

Unable to load plug-in assembly

This error occurs when you register the plug-in assembly for offline use. You must add the plug-in public key token in the allowlist, in order to solve this issue.
1. Copy Public key token value under Microsoft Dynamics CRM solution information

     

                                                                                                                                   

2. Create sub key folder with Public Key Token value: HKEY_CURRENT_USER\Software\Microsoft\MSCRMClient\AllowList\384531507f3

3. Check if public key is created and try your plugin.

It's very simple to generate a script file for key creation, you can see two helpful examples in attachments section.


Thanks,
Nicola Grillo

Reference

http://technet.microsoft.com/en-us/library/gg309582.aspx

http://msdn.microsoft.com/en-us/library/bb955364.aspx