Go to software management, then zentyal components
Select 'BASIC VIEW'
and you will be able to install the 5 different 'roles' of zentyal
If you want to install just 1 single package, click 'advanced mode'. Then you get a list of each available zentyal package to install.
After you have installed the packages, you have to click the red 'save changes' button in the upper right corner.
Be aware that after installing and saving changes, you have to activate each module in the 'Modules' section of the dashboard.
I suggest to do a lot of reading in the
documentation sectionIf you need more info, I advice to buy the
zentyal for admins book in the zentyal store.