Remote Desktop Service Manager - configure permissions for Remote Desktop Users to Send Message, Disconnect, Logoff

Hello, dear colleagues.

We are using Windows Server 2012 R2 as Remote Desktop Server. Also use Windows Server 2008 R2 with Remote Desktop Service Manager to control RDS user sessions (Send Message, Disconnect, Logoff, Query Info). 

Send Message, Disconnect, Logoff options works only for users in Administrators group.

I can't to configure permissions for Remote Desktop Users, specific user or AD group. 

To set permissions I'm running RDS Host Configuration on Windows Server 2008 R2 and connect to Windows Server 2012 R2. Then double-click RDP-Tcp, Security tab, add specific user account , AD group or configure advanced permissions for Remote Desktop Users.  

But, as I sad above, these options works only for users in Administrators group. How to make it work for Remote Desktop Users or specific user, AD group?

Thanks.