how to grt backup windows vmachine working in different domain than virtual hypervisor

Hello,

I have question.

I would like to set my backup job for grt on HA Hyper-V virtual machine.

The problem is that my hypervisor host work in domain A and windows virtual machine is in domani B. 

Also there is no trust between domain A and B.

Is there any posibility to get grt backup form cluster backup?

Or i need to backup just that wirtual machine?

I couldn't find any place to specyfi set of credentials for virtual machines.

Ps.

Hypervisor host is windows 2008 r2, same v-machine and I use backup exec 2014 sp4

Thanks for all advices

Best Regards

Lombarski Sebastian