We are a Smoothwall school but this may be reflected on other filters.
Last year, I was able to finally get this working but Google changed their API URLs and it stopped working again. What should happen is when on the Google page, you click the microphone icon or say "Ok Google", it will pop up a different page that listens for speaking and translates that into words that will be searched. But since the API changes, it doesn't.
With our Smoothwall, we added a new category for Google URLs to allow explicit allows so no-authentication was required. When I look at the filter while testing, everything looks good for the filter. We do SSL inspection and I do believe it is related to it. What is strange is on our public wireless, we disabled SSL inspection and it works fine.
So I am wondering if anybody has this working and if so, what URLs do you have allowed for Google? If not, can somebody test and see if they can get it working? Our SpecEd department would really like to use this feature for some kids.
Thanks!