2015-03-28 06:46 AEST by Glen Starrett - The message when adding a non-aliased passwd user is misleading:

>>>>
C:\Windows\system32>cvs -d :sspi:localhost:/repo1 passwd -a foo
Adding user foo@localhost
New Password:
Verify Password:
cvsntsrv server: *WARNING* CVS user 'foo' will not be able to log in until they
are aliased to a valid system user.
<<<<

Run As User can be used also to set the login context for them.  See also
information in bug 6839.