Microsoft says an Exchange Online issue that mistakenly quarantined legitimate emails last week was triggered by faulty heuristic detection rules designed to block credential phishing campaigns.
Microsoft Exchange Online has been quarantining legitimate business emails since 5 February. Invoices, contracts, and client ...
Microsoft has confirmed Exchange Online is incorrectly flagging legitimate emails as phishing due to an overly aggressive URL ...
Microsoft is investigating an Exchange Online incident that wrongly flags emails as phishing, quarantining messages and disrupting delivery.
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