ID

IdFix DirSync Error Remediation Tool

A free Microsoft tool that identifies and fixes problems with User, Contact, and Group objects in on-premises Active Directory Domain Services (AD DS) before synchronization to Office 365 and Azure AD. Detects errors such as invalid characters, duplicates, and formatting problems that could prevent successful synchronization with Azure AD Connect.
Latest: 2.6.0.3
Last checked: Jun 9, 2026 12:10am
Rank: 9394/15140
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Overview

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License: FreeInstaller: ClickOnce applicationWinget: Available

Version & Lifecycle

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Current: 2.6.0.3

Top Contributors

Top sitewide contributors:

  1. Anbarasan
  2. nico_k
  3. Bob
  4. Vigneshwaran

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Release Notes & Updates

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Also known as

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IdFixIdFix DirSync Error Remediation ToolMicrosoft IdFix

Packaging Notes

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Distributed as a zip file containing IdFix.exe. Requires extraction before use. Default extraction location: C:\Users\\Documents\IdFix

Notes

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Requires Windows 7 64-bit or later. Requires Microsoft .NET Framework 4.0 or later. Must be run on a domain-joined machine with an account that has read and write permissions to AD DS. Provides suggested fixes in the UPDATE and ACTION columns. Changes are applied only when the Apply button is clicked.