Verify each User Profile Service Application has an associated Managed Metadata Service Connection (SharePoint Server)
APPLIES TO: 
2013 2016 2019 Subscription Edition 
SharePoint in Microsoft 365
Rule Name: Verify each User Profile Service Application has an associated Managed Metadata Service Connection.
Summary: If the Managed Metadata service is not associated with the User Profile service application, features such as social tagging and properties backed by managed terms do not work.
Cause: The Managed Metadata service connection is not included in the group of connections that is associated with the User Profile service application.
Resolution: Edit the connections for the User Profile service application.
Verify that the user account that is performing this procedure is a member of the Farm Administrators group.
On the Central Administration home page, click Application Management.
On the Application Management page, in the Service Applications section, click Configure service application associations.
On the Service Application Associations page, in the View list, click Service Applications.
In the Web Application/Service Application column, click the User Profile service application for which you want to edit the connection.
In the Configure Service Application Associations dialog, select the Managed Metadata Service check box, or select Default in the Edit the following group of connections list, and then click OK. By default, all connections are included.