I also was surprised. I have MS account connected to my phone and it works fine. All apps like OneNote or calendar works fine. For my Nokia account I use GMAIL account as login. And about this account was my discussion with support. If it hasn’t work for about a year, so where are my sms and contacts? What happened with them? I have more than 5GB of free space and all updates installed. What I had noticed one time, was that I have two Outlook accounts on the list, when new contact is created. I want to get this data back. What should I do?
I checked, now I have only one Outlook account on the list so something had to change few days ago, and the only one difference is this account which can be set as Nokia Account on Mobile.
Marcin