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Early in 2022, a widespread disruption impacted Microsoft Exchange servers globally. Self-hosted Exchange servers experienced a mail outage beginning at midnight on New Year’s Day. This malfunction stemmed from the date conversion of 01/01/2022. The numerical representation, 220101000, triggered a failure within the server’s anti-malware engine, a component designed to filter malicious software, resulting in a complete halt to email transmissions.
This issue significantly affected numerous Mac users within businesses and organizations, given the prevalent use of Exchange servers for email communication.
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The glitch seemingly impacted diverse Microsoft Exchange server versions and patch levels. However, the problem wasn’t universal; many servers remained unaffected, suggesting the anti-malware scanner was simply deactivated on these systems. This temporary workaround – disabling the anti-malware scanner – using the PowerShell script, Disable-AntiMalwareScanning.ps1, is the short-term solution
