I am using windows 7 Enterprise in an Active Directory environment. When logging on to a machine (from the "other user" credentials interface) as the local Administrator (the built-in Administrator) I type "Administrator" into the username field and the text under the password field that said "Log on to: %domainname%" (where "%domainname%" is the domain name) changes from the domain name to the local machine name, thus allowing the Administrator to logon to the local machine without the use of a fullstop (".\%username%"). So why? Why can it do this and can I get another local user account to do the same thing?

I want a local account user to be able to login to the local system without making any change to their credentials (i.e., no ".\user" or "usersPC\user" in the username field, just "user".

Hi, If the last logon account is a domain account, your request may not be able to achieve.Kim Zhou TechNet Community Support

This is not true though. I can boot up the machine, log in as my domain user, logout, enter the built-in administrator credentials without a preceding full stop or local scope specification and it will log me in as the built-in administrator.