Error when you run the IdFix tool: IdFix.exe is not a valid Win32 application
Original product version: Cloud Services (Web roles/Worker roles), Azure Active Directory, Microsoft Intune, Azure Backup, Office 365 Identity Management
Original KB number: 2859165
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, see IdFix DirSync Error Remediation Tool (This includes a list of system requirements.).