cannot shutdown computers on domain, only can log off

and your question is? ? ? . . .

I can ALWAYS shut down a computer, by pulling the plug or battery if nothing else.

If you do not have a "shut down" option, the domain administrator may have disabled that option as a domain policy. Call and find out why.

Notr a question, how do I fix the fact that all workstations cannot shutdown only logg off

in Active Directory, go to User, Administrative Templates, Start Menu and Taskbar, Remove and prevent access to the Shut Down command (disable). that should take care of that.

http://technet.microsoft.com/en-us/library/cc940398.aspx

http://www.pctools.com/guides/registry/detail/146/

Of course, you'll need to be an Active Directory admin to do that.