OK so what has Microsoft now done with the Run As command? it appears they have replaced it with the Run as administrator command:

The Run as administrator will only allow you to run applications as the local admin, so if you want to run an MMC as the domain admin, (as MS best practices is to not run interactively as a domain admin) what do you do?
My first thought was that of what I thought before; System Admins are going to need to run two OS's if you are wanting to try out Vista...
- Your Vista Machine for playing around on and testing
- Your XP Machine to do your daily Admin tasks.
I did a search on the Internet for a solution to this, I was given several results one option is to run this from a command prompt:
H:\> /env /user:tmau-akemp@domain.com "mmc %systemroot"\system32\dsa.msc"
but I got the error:
Error 740: The requested operation requires elevation
I then found an article on the Internet to change the policy for the Admin Approval from prompt for consent to prompt for credentials.
- To do this create a shortcut to GPedit.msc and then run as administrator.
- Go to Computer Configurations\Security Settings\Local Policies\Security Options
- Double click on "User Account Control: Behavior of the elevation prompt for administrators in Admin Approval Mode" and change the value from Prompt for Consent to Prompt for Credentials
now try to run your mmc shortcut as administrator you will be prompted for the credentials of an Administrator.
Tip if you are wanting to run as a local admin then use the .\ before the username this will default you to the local machine.