Use Classic Interface checkbox is Missing

Roles that belong to the Classic Center already use the Classic Interface. These roles are: Administrator, Full Access, and Payroll Setup.

 

Therefore, the checkbox for Use Classic Interface is not available when we navigate to Home Dashboard > Set Preferences > Appearance tab > Centers & Dashboards portlet.   

 

However, if a standard role can be customized, the option for Use Classic Interface is available. This is why the Payroll Setup Role still has the checkbox. Only the Administrator and Full Access Roles are not customizable.