Environment
LANDesk Provisioning
Target machine booting in UEFI mode
Problem/Issue/Symptoms
Booting a machine in UEFI mode in a network segment with an active PXE representative doesn't make the machine loading WinPE.
The PXE menu doesn't appear.
The machine reports the error PXE-E21: Remote boot cancelled
Solution
UEFI is still not compliant with the PXE menu specifications, therefore booting a machine in UEFI mode via PXE for provisioning works only when the machine is associated to a provisioning task on the core.
The error PXE-E21 appears when the machines not associated to a provisioning task on the core.
LANDesk submitted an enhancement request to the UEFI Forum regarding this issue. Once they add the support needed, LANDesk will be able to support the PXE menu for the devices booting vin UEFI mode as well.
At the moment, the only way to have the PXE menu functionality on a device booting in UEFI mode is setting it up to boot in BIOS mode.