Microsoft says Outlook.com outage is causing sign‑in failures
Microsoft is investigating an ongoing Outlook.com outage that is causing intermittent signing issues and preventing customers from accessing their mailboxes. [...]

Microsoft is investigating an ongoing Outlook.com outage that is causing intermittent signing issues and preventing customers from accessing their mailboxes.
Since the incident started over three hours ago, outage monitoring service Downdetector has received thousands of user reports, with most affected users reporting login problems and connection issues.
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