Managing personal Outlook.com account settings, security, and privacy
I have the same situation - EXCEPT! I checked my activity and I have SCORES of attempted (and thankfully failed) sign-ins from all around the world!! In the past month alone there was upwards of 40 sign in attempts that are all unrecognized.
I had absolutely no idea I am absolutely dismayed and despite my already lengthy PW I will be upping all my security protcols. Be careful everyone!