Health service data is not up to date

Question

Error Message: Health service data is not up to date

Background: 3 Azure Servers across 3 sites. Modified settings on 2 of the systems related to Staging Mode, settings changes back (disabled the feature).

2 hours later Health service Alerts started to display for 1 of the Servers. Sync appears to be working without any problems, however Portal continues to show this error for nearly a week now.

On closer inspection, determined older version was run on the problematic host, was running version 3.2.1823 of AAD and 2.21 AD Connect Sync. Versions were upgraded on this host, also ran script to ensure tls is using supported versions.

Event Logs on the problematic Server show event id's 1104, 1089 and 1085 under the AAD (operational) logs.

Running manual Sync is successful and the Portal shows Sync Activity is current. Unable to register the Azure AD Connect Health Sync Agent; not a recognized command and no match found if trying to add the module for Azure AD Connect HealthSync.

No firewall changes or other system changes prior to software upgrade to trigger this behavior.

Can review both working systems for reference however requesting expertise in troubleshooting this health issue