Import-Module ADSyncDiagnostics
Invoke-ADSyncDiagnostics -PasswordSync

Example

Issue when password hash synchronization was set as Disabled and Entra connect health was in error state after [[202408271224 Migrate Entra Connect DB|Migrate Entra Connect DB]]

PS C:\Program Files\Microsoft Azure Active Directory Connect> Invoke-ADSyncDiagnostics -PasswordSync
Staging mode is enabled. Password Hash Synchronization does not work when staging mode is enabled.

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references:

Troubleshoot password hash synchronization with Microsoft Entra Connect Sync - Microsoft Entra ID | Microsoft Learn