"IdFix.exe is not a valid Win32 application" error message when you run the IdFix tool

Applies to: Cloud Services (Web roles/Worker roles)Azure Active DirectoryMicrosoft Intune


When you try to run the IdFix DirSync Error Remediation Tool in your on-premises Active Directory Domain Services (AD DS) environment, you receive the following error message:
IdFix.exe is not a valid Win32 application
This issue occurs if you're running the IdFix tool on an operating system that's not supported for the tool.


Install and run the IdFix tool on a computer that's running the 64-bit version of Windows 7 or a later version.


For more information about the IdFix tool, go to the following Microsoft website. (This includes a list of system requirements.)
Still need help? Go to Microsoft Community or the Azure Active Directory Forums website.