Acronis Backup for Windows Server - User Guide - Manual (Page 34)

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3.12 Support for UEFI-based machines
Acronis Backup can back up and recover machines that use 64-bit Unified Extensible Firmware
Interface (UEFI) in the same way as it does for machines that use BIOS for booting.
This applies to both physical and virtual machines, no matter if the virtual machines are backed up at
a hypervisor level or from inside a guest OS.
Backup and recovery of devices that use 32-bit UEFI are not supported.
For details about transferring Windows machines between UEFI and BIOS, see "Recovering
BIOS-based systems to UEFI-based or vice versa" (p. 114).
Limitations

WinPE-based bootable media of a version earlier than 4.0 do not support UEFI booting.

Acronis Active Restore (p. 257) is not available on UEFI machines.

Acronis Startup Recovery Manager (ASRM) (p. 257) on UEFI machines can be activated only in
Windows.