Ah, Ok, so in an attempt to use iCal to synch Outlook with my Gmail only worked once for me as well! That's when search goole for Outlook calendar sharing with Gmail doesn't work and I found your article. At first I thought Microsoft was the culprit but now I see: since Google's G-Suite is working (a paid service) Google sees no reason to make it work in regular Gmail (a free service). Now, my suggestion to you: Put your warning about Google/outlook calendar synching not working front and center (top of your article) and save people from wasting their time on trying to get this to work.