Microsoft Exchange Online is experiencing a service degradation that incorrectly flags legitimate customer emails as phishing, quarantining them and disrupting communications. The issue, identified as EX1227432, started on February 5, 2026, at 10:31 AM EST and remains ongoing. Microsoft classifies this as an incident affecting Exchange Online, with some users unable to send or receive […] The post Microsoft Exchange Online Flags Customers Legitimate Email as Phishing appeared first on Cyber Security News.