Dynamics CRM user roles and classic UI changed from UCI

Add User Role

https://crmbook.powerobjects.com/system-administration/business-administration/business-units/

UCI changed from classic UI

https://xxx.crm.dynamics.com/main.aspx?forceclassic=1

Delete all URL parameters and add forceclassic = 1 can be converted to classic UI

permanently switched to the classic

In power platform inside the admin center, select the instance and then opening our basic behavior.