Success. VIA THIS FORUM. I'm reposting the work-around here from the other thread in this forum in my own words
Re: Telematics upgrade for US import to Canada (viewtopic.php?p=482792&sid=fd35a9c966ccddbb02104435fed29472#p482792
Log into Nissan Connect Website, Remove your Vehicle from the system: (click "My Garage" tab -> click "Remove Vehicle") It will give an ominous warning message, but no worries.
Call DEVIN at Nissan Connect 1-800-343-6913x457505
Tell him to wipe clean your VIN# and then add it back to the Nissan Canada portal.
Log into https://canada.nissanconnect.com/
Add Your Vehicle (It will prompt for your VIN#)
It will then give you a new userid and password to be entered into the LEAF TCU, you have to do this manually into the car via the Settings->Carwings menu then click "Send ID and Password" on the TCU screen. This may take up to 5 minutes or more. For me, at first, it just started registering nearby charging stations, about 5 minutes after that, I resent the id/password manually, and it fully authenticated the vehicle.
Then go back to https://canada.nissanconnect.com/
login and you should see your car with a new USER ID.
Click (red) CARWINGS bar below the Car icon.
You will now get updates. Can initiate pre-heating, and grab data from the vehicle again!
(Of course if your local service provider (for me it is Rogers) shuts their 2G down any time in the future, you will lose access, probably forever this time.)