Clients do not properly boot to a PXE Menu whether through a Reboot to Automation task or by manually booting client.
PXE boot options menu only contains option to boot to 'Next Device (BIOS/EFI)'
Applies To
Newly installed or upgraded Deployment Solution 8.x
NBS General settings were not configured to respond to computer under either of the scenarios(unknown, predefined, or managed).
Configuring NBS settings for SBS to respond to clients with a specific preboot configuration allowed clients to boot with the PXE boot menu as expected.
See Configuring and Filtering Computers to Boot with PXE
Further note: PXE M0F is not an error and reflects a successful PXE boot encounter as far as the nic's boot agent is concerned.