[Samba] pdbedit's add machine option

[MargoAndTodd]

Hi All,

I have been reading through "man pdedit".  I came across
the "-m" option:

        -m
           This option may only be used in conjunction with
           the -a  option.  It will  make  pdbedit to add
           a machine trust account instead of a user
           account (-u username will provide the machine name).

           Example: pdbedit -a -m -u w2k-wks


Not to ask too stupid a question, but why would you want
to have a "machine" account?  Would not the user account
suffice?

Confused,
-T