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https://deploymentbunny.com/2016/02/29/osd-how-make-pxe-work-in-configmgr-osd-mdt-and-wds-work-perfectly-fine-stop-using-dhcp-option-66-67/
OSD - How make PXE work in ConfigMgr OSD, MDT and WDS work perfectly fine - Stop using DHCP Option 66 & 67