Stumbled upon some nice scripts that helps migrating and moving virtual machines from the classic stack (Azure Service Manager) to ARM (Azure Resoucer Manager)
You find it at https://github.com/fullscale180/asm2arm
Managing resources within Azure when there is two stacks complicates things a bit.
Two totally different approaches in how the resources are built and deployed.
A good rule is to always deploy all resources in ARM.
ASM will eventually be discontinued,
So if you already now want to move your resources you should look up asm2arm.
It wont move all types of resources but it will help you with the vm´s at least.