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IDFix Tool

The idfix-tool is a command-line utility designed to diagnose and resolve synchronization issues between Azure AD Connect (formerly known as DirSync) and Microsoft Entra ID. It provides detailed insights into sync errors, attribute mismatches, and object conflicts, enabling administrators to troubleshoot and fix problems efficiently. This section explains how to use the tool to identify and resolve common synchronization issues.

Installing and Preparing the idfix-tool

Before using the tool, ensure Azure AD Connect is installed and running on your on-premises server. The idfix-tool is included in the Azure AD Connect installation package.

Prerequisites:
- Administrative privileges on the sync server.
- Access to the Azure AD Connect configuration database.

Installation:
If the tool is not already installed, run the Azure AD Connect setup and select the "Sync" option during configuration. The tool will be available in the C:\Program Files\Microsoft Azure AD Sync\ directory.

Running the idfix-tool

Use the following command to launch the tool:

idfix-tool
This opens the interactive interface. For non-interactive use, specify parameters via the command line.

Example:

idfix-tool -action list -objectid "CN=TestUser,CN=Users,DC=example,DC=com"
This command lists sync issues for the specified object.

Analyzing Sync Issues

The tool identifies problems such as:
- Attribute mismatches (e.g., proxyAddresses not matching between on-premises and Entra ID).
- Password sync errors (e.g., password expiration or complexity mismatches).
- Object conflicts (e.g., duplicate users or misconfigured attributes).

Key Commands:
1. List all sync issues:

idfix-tool -action list
This displays a summary of unresolved sync errors.

  1. Check specific object details:

    idfix-tool -action details -objectid "CN=TestUser,CN=Users,DC=example,DC=com"
    This provides granular information about the object’s sync status.

  2. Fix identified issues:
    Use the -action fix parameter to resolve specific problems. For example:

    idfix-tool -action fix -objectid "CN=TestUser,CN=Users,DC=example,DC=com" -fixtype "password"
    This addresses password-related sync errors.

Common Sync Issues and Fixes

Issue Diagnosis Resolution
Attribute mismatch The tool highlights conflicting attributes (e.g., mail vs. proxyAddresses). Manually correct attributes in Active Directory or Entra ID.
Password sync failure The tool flags password expiration or complexity mismatches. Ensure passwords meet Entra ID complexity requirements and re-sync the object.
Object conflict Duplicate users or misconfigured attributes are detected. Use the -action fix command to resolve conflicts or delete duplicate entries.

Advanced Diagnostics

For complex issues, use the -loglevel verbose flag to generate detailed logs:

idfix-tool -action list -loglevel verbose
These logs can be analyzed for patterns or errors in the synchronization process.

Key takeaways

  • The idfix-tool is essential for diagnosing sync issues between on-premises directories and Entra ID.
  • Use -action list and -action details to identify and analyze specific sync errors.
  • Resolve common issues like attribute mismatches and password errors with targeted fixes.
  • Enable verbose logging for advanced troubleshooting of complex synchronization problems.
  • Regularly validate sync health to prevent recurring issues.