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Troubleshoot EAS proxy issues

This page tells you how to fix common issues with the Sophos Mobile EAS proxy.

The EAS proxy service fails to start.


The EAS proxy service starts and then stops immediately.


The EAS proxy service stops if it encounters an unrecoverable issue during startup.

What to do

Check the logs of the EAS proxy for information about what went wrong during startup.

Your EAS proxy can’t connect to Exchange Online.


Your EAS proxy in PowerShell mode stops connecting to Exchange Online although it worked in the past.


Microsoft might have stopped supporting your version of the Exchange Online PowerShell module, ExchangeOnlineManagement. When this happens, your EAS proxy in PowerShell mode can’t connect to Exchange Online anymore.

Currently, only versions 3.0.0 and later of the ExchangeOnlineManagement module are supported.

What to do

Open PowerShell as an administrator and run the following commands.

  1. Check your version of the ExchangeOnlineManagement module:

    Get-InstalledModule ExchangeOnlineManagement | Format-List Name,Version
  2. If the version is 2.0.5 or earlier, update to the latest available version:

    Update-Module -Name ExchangeOnlineManagement

You can also check the Microsoft troubleshooting information.