User.Identity.Name ="IIS Server user name instead client user name" IIS local network , Windows authentication

Hi,I like to get client User.Identity.Name on our local network,we are using windows authentication.
My web.confic
<authentication mode="Windows" />           <authorization>               <deny users="?"/>            </authorization>
IIS server  option -Windows Authentication - Enabled
                            - Others Authentication - Disabled
My IIS server name - AdminIIS
Login windows user to IIS server - Admin
I run my application from client computer                 client Login Windows User - Mainten ...