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JetBrains explains that scans performed by Microsoft Defender were adding tens of seconds to the first launch of Rider and ReSharper after ReSharper moved to an out-of-process architecture. In cooperation with Microsoft, Defender was improved, and JetBrains also released an open-source tool to measure the impact of scanning on development tools.
Microsoft is investigating a defect in Defender for Office 365 Safe Links that caused some legitimate Google Search links to be classified as malicious and blocked from opening. IT administrators may receive incident-related alerts in Microsoft Defender and Microsoft Sentinel, with no impact scope or remediation timeline announced.