How to Set "log into" as a default to Domain Name

Hi,

While user wants to login into Service Desk there is an option "log into" which user should choose the domain.
In our organization there are devices which are not in domain like workgroup and they are visible in log into option.
but there are no user to login through these devices.

I want to know how can I make the "log into" option to our domain name so user does not need to choose his domain each time he want to login and he just need to type his username and password.

Cause from the time that work group devices added in our network and they are visible in log into user confused how to login. I want that these option by default be selected in the domain name.

Is there any way to set this configuration in Service Desk ?

Best Regards