Extend VHDX in Windows 11

Extend Volume in Disk Management may be greyed out when attempting to extend a VHDX volume. You can use Diskpart to extend the volume.

First detach the VHDX

Using Diskpart select the VHDX location

select vdisk file="C:\Path\To\Disk.vhdx"

Expand the disk to the required size in MB, e.g. 2Gb, 1GB = 1024MB

expand vdisk maximum=2048

Reattach the VHDX

In Disk Management(diskmgmt.msc) extend the Volume with the newly added space.