Trying to access Mac server using Windows Vista. I know that the server admin is setup correctly. I have no trouble accessing with Windows XP, but none of my Vista machines will work. I continually get invalid user or password. And I’d like to know why when I type in the user name it shows the name of the computer name/user name, i.e. COMPUTER/username. Does that have a bearing on the invalid user name? Can it be a NTLMv2 issue?