The "Manage" command is not available in the ActiveRoles Server Helpdesk site
When navigating the Help Desk web interface the option to manage computer objects does not exist.
This is by design. The Help Desk web interface is limited
The manage command is not intended to be in the Helpdesk site. Please create a new help desk site using a new configuration based off of the default site for administrators. Then remove any unwanted commands and menus from the site. The administration site is not limited like the help desk site.