The social server is the SharePoint server (SharePoint 2019, Office 365, SharePoint 2016, SharePoint 2013, or SharePoint 2010) running the User Profile service application.
You must connect to a SharePoint server as a social networking platform, to view these features:
By default, you do not have to configure a social server. When you add your first SharePoint site, it is automatically set as your social server.
If you have more than one site registered for the SharePoint server, the credentials for the first listed site are used to identify you on the social server.
If harmon.ie fails to recognize your social server automatically, you can manually configure or change the social server.