I upgraded Ubuntu to 16.04 and came across the calendar application. However, in tutorials I found online I could see people integrating gmail accounts from the calendar settings menu. I could only see a link to "Online Accounts". There I can add my gmail account, but there's no way to select the calendar application in the "The following applications integrate with your Google account".
However, after I installed the gnome "user interface" and the gnome-shell (sorry for using the wrong lingo, it's my first time doing this), I could see the new option in the calendar settings. I did that and it worked well.
However, I was so frustrated with gnome (several apps crashing multiple times, work spaces lackluster, pixel bugs and finally a failure of locking the screen using a hotkey, no matter whether I install xscreensaver on top of lightdm or not), that I went back to Unity.
Now in Unity, my Calendar app still has the google entries that it used to have before (so something is apparently working; but whether they will be updated/refreshed I am not sure), but Calendar Settings still doesn't give me the option of integrating gmail and other calendars.
How do I get that functionality? It can't be that I have to change back to the gnome UI, can it?