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I Understand that you are unable to run the Entra Connect Health, and you are getting an error.
This might be issue with the connectivity could you please check the Outbound connectivity to Azure service endpoints.
please try to restart the Entra Connect Health agent and see if the issue is fixed.
In order to install the Connect Health for Sync Agent, you need to be a Global Administrator. To activate the agent, you need to reinstall the agent using a global administrator account.
check the Requirements of Microsoft Entra Connect Health download the latest version of Microsoft Entra Connect and install. make sure .NET 4.6.2 Framework is installed.
Hope this helps. Do let us know if you any further queries by responding in the comments section.
Thanks,
Akhilesh.
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