I have shared my Outlook 356 Calendar successfully via iCal URL to Google. It shows up perfectly as expected in the web Calendar.
On Android, I can see the calendar in the list of available calendars, but it has no entries. I know how to show/hide additional calendars in Android. I have tried the original Google Calendar app as well as other Android Calendar apps. They all work fine with my other Calendars, but that one that I created via the iCAL URL does not work.