Aye, all good and worthy things. A Windows domain, however, typically establishes its own hierarchical time system (PDCe -> RWDCs (+ clients) -> RODCs (+ clients)), with only the PDCe relying on external time sources. Windows SNTP is not really designed for high precision/high accuracy anyway, so, you just kinda go "meh good enough" not too far into the adventure. Also the time management CLI tools stink.