This policy setting allows you to specify the list of social network providers that will never be loaded by the Outlook Social ...

This policy setting allows you to specify the list of social network providers that will never be loaded by the Outlook Social Connector.  If you enable this policy setting, social network providers added to the list will never be loaded by the Outlook Social Connector.  This list needs to be semi-colon delimited. If you disable or you do not configure this policy setting, the Outlook Social Connector can load any provider specified by the user.