Microsoft Exchange Server Logon Network Security

[Kurt]

I'm currently having a problem removing the logon when Outlook starts. The
machines that aren't requiring username, password and domain at Outlook
startup have "NT Password Authentication" set as the Logon network security
type. I know if i select "None" from the drop-down menu it will require
login the next time Outlook starts. My question is once username, password
and domain are required, I can't seem get the machine back to not asking for
these anymore. Even if I select "NT Password Authentication", it still asks
for login at startup. How can I get rid of this?

 

[Kurt]

I forgot to mention this is in Outlook 2000.