Hi there,
To enable Azure AD Connect Health email notifications you can follow the below steps
In the Azure Portal, search for Azure AD Connect Health
Select Sync errors
Select Notification Settings.
At the email notification switch, select ON.
Select the check box if you want all global administrators to receive email notifications.
If you want to receive email notifications at any other email addresses, specify them in the Additional Email Recipients box. To remove an email address from this list, right-click the entry and select Delete.
To finalize the changes, click Save. Changes take effect only after you save.
You can get more info from here https://learn.microsoft.com/en-us/azure/active-directory/hybrid/how-to-connect-health-operations
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