Your network contains a server named Server1 that has the Hyper-V server role installed.
Server1 hosts a virtual machine (VM) named VM1 that runs Windows Server 2003 Service Pack 2 (SP2).
VM1 is configured to use a 127-GB dynamically-expanding virtual hard disk (VHD).
You need to add 500 GB of disk space to VM1.
The solution must minimize the amount of downtime for VM1.
What should you do?