There is a separate community for the simulator:
https://community.arubanetworks.com/community-home?CommunityKey=aa40c287-728e-4827-b062-5eff4ed6410b
Your problem is perhaps due to security restrictions on your virtual switch which doesn't allow the change/forging of MAC addresses.
Did you try to enable "Enable MAC address spoofing" in the VMs Network Adapter's Advanced Feature Tab?
Edit: I just checked the Release Notes of the simulator ... Hyper-V is not supported. Maybe you want to consider using GNS3 for this which is a great simulator environment which has already a lot of scripts/config integrated. https://gns3.com/software/download
Regards,
Thomas