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Microsoft Exchange CVE-2026-42897: OWA Patch and Mitigation Guide
Install the June 2026 Exchange Server updates for CVE-2026-42897, keep mitigations in place during rollout, and verify OWA, mail flow, logs, and backups.

Install the June 2026 Exchange Server updates for CVE-2026-42897, keep mitigations in place during rollout, and verify OWA, mail flow, logs, and backups.