For the last few weeks, months that I was working on Windows 10 Insiders release I was having problems to do anything that was related to Microsoft account. I couldn't open Microsoft Store, add new email account under settings and yesterday after one of our Administrators migrated my account from Exchange 2016 to Office 365 my Outlook said goodbye as well. I couldn't activate outlook, I couldn't add account, I couldn't even go thru Autodiscovery phase.