This commandline will re-authorize the WDS Server in DHCP 🙂

wdsutil /verbose /progress /initialize-server /reminst:”e:RemoteInstall”

The errors when boot a PXE Client was:

PXE-T01: The specified file was not found.
PXE-E3B: TFTP Error – File Not Found

With procmon i noticed the file was existing at the path queried.