I have recently had my Outlook email frozen and receive the above message. 
The email address is *** Email address is removed for privacy ***.  I couldn't access the account on the day that Microsoft removed the link between email accounts.  I used to access the account from my *** Email address is removed for privacy *** account.  I have tried the resetting form but don't know enough of the answers to activate.  I can answer some questions about the senders of the emails though.

Andrew Moon