
1 - From Server, stop VM1.
2 - From Server1, run the Remove-VMHostAssignableDevice cmdlet.
3 - From the Server1, run the Mount-VMHostAssignableDevice cmdlet.
4 - From Server1, enable the device by using Device Manager.
Reference:
https://docs.microsoft.com/en-us/windows-server/virtualization/hyper-v/deploy/deploying-storage-devices-using-dda