Please add Icons/Widgets/Deaktopbuttons that allow it to access contacts or calendar directly.
I allways have to open the Outlook-App to then navigate to the calendar section or the contacts section if I want to access those sections.
Please add desktop shortcuts that allow to access those sections dirctly. Some Android-Apps add such shortcuts as small widgets (e.g. for a shortcut to a contact or a website link) that are as small as normal appicons. Maybe you could do something like this too.
Ben Glasson commented
Bare minimum required to avoid users switching to Gmail syncing to avoid current mess with Contacts app syncing