Microsoft to block Exchange Online access for outdated mobile devices

Source: BleepingComputer

Author: Sergiu Gatlan

URL: https://www.bleepingcomputer.com/news/microsoft/microsoft-to-block-exchange-online-access-for-outdated-mobile-devices/

ONE SENTENCE SUMMARY:

Microsoft will block devices with outdated Exchange ActiveSync versions from accessing Exchange Online by March 1, 2026, urging updates.

MAIN POINTS:

  1. Microsoft to block outdated Exchange ActiveSync versions on mobile devices accessing Exchange Online starting March 1, 2026.
  2. Change affects only devices using native email apps with Exchange Online, not on-premises servers.
  3. Outlook Mobile users aren’t affected as it doesn’t rely on Exchange ActiveSync protocol.
  4. Popular email apps from Google and Samsung are updating to support the new protocol version.
  5. Apple’s iOS Mail app supports ActiveSync 16.1 since iOS 10, ensuring compatibility.
  6. IT admins can use PowerShell to report devices using older ActiveSync versions.
  7. Microsoft collaborates with vendors to ensure smooth transition to updated protocols.
  8. Encourages users to update devices and apps to avoid service disruptions.
  9. Last month, Microsoft fixed an issue affecting Microsoft 365 users connecting via Exchange ActiveSync.
  10. Proper IAM practices are crucial for business impacts beyond IT departments.

TAKEAWAYS:

  1. Update mobile email apps to ensure continued access to Exchange Online services.
  2. Use provided PowerShell command to identify devices running outdated protocols.
  3. iOS 10 and later users should not experience issues accessing Exchange Online.
  4. Collaboration with vendors aims for minimal disruption during the transition.
  5. Staying updated with protocol versions prevents service access issues.