You created a WinPE-based bootable media.
When you boot a machine with Windows 8 or later, or Windows Server 2012 or later with this bootable media, Disk Management option is missing.
This is the expected behavior.
WinPE-based media supports Disk Management utility for Windows 7 and below. Disk management for Windows 8 and 10, and Windows Server 2012 or later is not supported in WinPE of Acronis Cyber Backup 12.5 and Acronis Cyber Protect 15.
There are two possible workarounds if you need disk management function in bootable media:
- Create a Linux-based media: see instructions in User Guide
- If you have Acronis Disk Director, create a WinPE media with Acronis Disk Director to manage disks. See Acronis Disk Director 12: Creating WinPE-Based Acronis Bootable Media