Non-members of your team (project, departments & groups) by default can be landed on a default module configured by the network admin or the team admin when navigating to the respective team, refer steps here;
1. Navigate to the team, click on Admin Tools -> Settings -> Landing Page Settings
2. From the drop down, choose the module you wish to set as a the default landing page page, choosing ‘Default’ as the value in dropdown will set the first module in the left navigation bar to be the module on which users will land when they visit this department.
Tip: To reorder modules on the left hand navigation within the teams, click on manage modules from the admin tools within the team then drag & drop to re-order