Is Outlook Down Right Now? Outlook login not working? What caused the Microsoft Outlook outage today — and was it hacked? Microsoft stayed silent until users flooded social media. Around 800 users hit a wall on Monday morning. Login loops began suddenly. Access failed repeatedly. Panic spread fast across platforms. For nearly four days before the outage peaked, users reported glitches—but Microsoft did not publicly address the issue. This is the full story behind what really happened.