Microsoft’s 2026 Email Lockdown: Upgrade or Get Left in the Inbox Dust!

Microsoft is putting its foot down on outdated email software. Starting March 1, 2026, devices running Exchange ActiveSync versions below 16.1 will be blocked from Exchange Online. Time to update—or face a digital desert! Thankfully, Outlook Mobile users are safe, so you can still email in style.

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Published: December 16, 2025 12:57 pmAdded: December 16, 2025 at 5:08 amAssembled by: The Editor
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Hot Take:

Microsoft just served a no-access eviction notice to outdated mobile devices! If your device is still rocking that ancient ActiveSync version, it’s time to upgrade or be left out in the cold—no more email love for you after 2026!

Key Points:

  • Microsoft will block outdated Exchange ActiveSync (EAS) versions from accessing Exchange Online starting March 1, 2026.
  • Devices running EAS versions below 16.1 need to be updated to connect post-deadline.
  • Only native email apps connecting via Exchange Online are affected; Outlook Mobile and on-premises Exchange Server installations are safe.
  • Apple’s iOS Mail app supports EAS 16.1 since iOS 10, so newer iPhones are unaffected.
  • Microsoft offers a PowerShell command for IT admins to identify devices with outdated EAS versions.

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