Solution from support : "Yes, it is still recommended to use the Deployment Server for centralized management and consistency across Heavy Forwarders. However, if local customizations are required, ensure those changes are synced back to the DS (etc/deployment-apps/<app_name>/local) to prevent overwrites. Alternatively, use 'excludeFromUpdate' in serverclass.conf to protect specific files or directories. For better scalability, avoid making direct changes on HFs and manage all configurations via the DS whenever possible."
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