When you manually enable or disable the Skype Meeting Add-in for Microsoft Office 2016 add-in by using the COM Add-Ins dialog box (by using the steps in the “Resolution” section), the following registry data is updated:
Key: HKEY_CURRENT_USER\Software\Microsoft\Office\Outlook\Addins\UcAddin.LyncAddin.1
DWORD: LoadBehavior
Value: 3 = add-in is enabled, 2 = add-in is not enabled