The DENY command will deny a user or  a  group  access  to  a  File
   Server service that was previously granted using the GRANT command.

   Format:

     DENY user-name alias
     DENY/GROUP group-name alias

Additional information available:

ParametersQualifiers

user-name

   user-name is the 1 to 12 character name of the user to whom  access
   is being denied.

group-name

   group-name is the 1 to 10 character group name of the group to whom
   access is being denied.  The only valid group name is PUBLIC.

alias

   alias is the 1 to 25 character name by  which  the  user  or  group
   knows the service.

Additional information available:

/GROUP

 /GROUP

   Specifies that a group is to be denied access to the service.