Customer portal provides feature to manage SugarCRM Module’s configuration for their portal users. You can decide and configure default SugarCRM modules as well as custom modules accessibility.
Navigate to “Admin -> Customer Portal”. Click on “Portal Module Configuration”.
You will get the list of default and custom module. Just need to drag and drop to make them enabled for portal users.
Note: Only those default and custom modules will get listed who is having relationship with contact module.