With the latest Azure AD Connect (AAD Connect) version (1.1.647.0) published October 19th 2017 (available at http://go.microsoft.com/fwlink/?LinkId=615771) a new troubleshooting functionality is available.

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This functionality is going to help you troubleshooting (at first) password synchronization issues and

When starting the troubleshooting tool, a PowerShell prompt is launched, then you have to define what you want to troubleshoot:

  1. Password synchronization
  2. Get general diagnostic which will generate a diagnostic report saved in the C:\ProgramData\AADConnect\ and named AADConnectDiagnostics-<date and time of exection>.txt with configuration details, like features enabled or additional attribute(s) synched

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