I'm also able to confirm that the same behavior occurs in a VM (under VMware Workstation) running in UEFI mode, so the behavior is not limited to PowerEdge. I can manually install grub by switching to the command line, but the installer will not find where to install grub.
I'm also able to confirm that the same behavior occurs in a VM (under VMware Workstation) running in UEFI mode, so the behavior is not limited to PowerEdge. I can manually install grub by switching to the command line, but the installer will not find where to install grub.