You have a stand-alone server named SERVER01 that runs Windows Server 2008 R2
Enterprise with service Pack l and Hyper-V. The server hosts 12 virtual machines (VMs).
You add Hyper-V on a new server named SERVER02. SERVER02 runs Windows Server
2008 R2 Enterprise. One of the VMs on SERVER01 is configured to use dynamic memory.
You export the VM.
The VM cannot be imported on SERVER02. You prepare to export the VM again.
You need to ensure that the exported VM can be imported on SERVER02.
What should you do?

A.
Remove all DVD drive media from the VM.

B.
Configure the VM to use static memory.

C.
Start the VM and allow it to run.

D.
Start and then pause the VM.

Explanation:

You cannot export a paused VM.
Caution When Export Dynamic Memory enabled Virtual Machine
You will see below warning when try to export a Dynamic Memory enabled Virtual machine.

You can export and import this Virtual machine when your physical host is running on R2
with SP1.
SERVER02 runs Windows Server 2008 R2 Enterprise WITHOUT SP1
However, if you export and import to Hyper V R2 (without SP1), then the import will fail. To
avoid this issue, change the memory to “Static” if you would like the VM to run on Hyper V
R2 (without SP1).
http://www.ms4u.info/2010/11/caution-when-export-dynamic-memory.html