I would disable and re-enable again if the problem continues:
[https://learn.microsoft.com/en-us/azure/active-directory/hybrid/tshoot-connect-password-hash-synchronization#no-passwords-are-synchronized-manual-troubleshooting-steps
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Password Hash Synchronization heartbeat was skipped in last 120 minutes.
Password Hash Synchronization has not connected with Azure Active Directory in the last 120 minutes. As a result passwords will not be synchronized with Azure Active Directory.
PS C:\WINDOWS\system32> Invoke-ADSyncDiagnostics -PasswordSync
========================================================================
= =
= Password Hash Synchronization General Diagnostics =
= =
========================================================================
AAD Tenant - brightwood.onmicrosoft.com
Password Hash Synchronization cloud configuration is enabled
False
AD Connector - bwc.brightwood.com
Password Hash Synchronization is enabled
Latest Password Hash Synchronization heartbeat is detected at: 01/18/2023 19:48:04 UTC
Directory Partitions:
=====================
Directory Partition - bwc.brightwood.com
False
False
False
Last successful attempt to synchronize passwords from this directory partition started at: 1/18/2023 7:48:03 PM
UTC and ended at: 1/18/2023 7:48:05 PM UTC
Only Use Preferred Domain Controllers: False
Checking connectivity to the domain...
Domain "bwc.brightwood.com" is reachable
Did you find Password Hash Sync General Diagnostics helpful? [y/n]:
My Synchronization Service manager says there are no problems from its point of view.
I am in the dark here and any help would be welcomed.
I would disable and re-enable again if the problem continues:
[https://learn.microsoft.com/en-us/azure/active-directory/hybrid/tshoot-connect-password-hash-synchronization#no-passwords-are-synchronized-manual-troubleshooting-steps
Thanks - Andy - most helpful