Microsoft says Outlook.com outage is causing sign‑in failures

Microsoft is investigating an ongoing Outlook.com outage causing intermittent sign-in failures, unexpected sign-outs, and 'too many requests' errors for affected users; the company has labeled the incident as service degradation and has not yet disclosed root cause or the geographic scope. The article references prior Exchange Online and Microsoft 365 sign-in incidents and includes an unrelated promotional line about exploits, but provides no technical indicators or evidence of malicious activity.