VM hard drives detected as Thin Provisioned Drive

Hi,

We have some VM that we cannot defrag because their virtual hard drives are detected as "Thin Provisioned Drive". When we setup this drives, we used a Dynamic VHDX, but due to fragmentation on the host disk, we converted all VHDX to Fixed.

It seems that the guess OS is still detecting the virtual disks as thin provisioned, so we cannot defrag them unless we use the command line tool defrag.exe.

Is there any solution?

Thanks,

Enric