Hi Brent, apparently this is expected if I understand this correctly:
"It will come to Targeted in March of 2018, then Semi-Annual the next release after that. Those builds provide customer a slower update path from Monthly, which is why you haven't received the update yet."
"Messing with FI won't effect the feature in Outlook 2016 until you are on Monthly channel or the feature comes to Semi-Annual. It will enable/disable the feature in the web, in Outlook for Mac, etc."
I got that from here, this was when someone asked what effect enabling FI in PowerShell would have.