I've read the previous posts on this but none of the solutions seems to apply.
I have Veeam B&R Free on a Windows 2012R2 server
I am trying to deploy the services to 4 Windows Server 2008R2 servers in a cluster
I get the "Failed to create persistent connection to ADMIN$" error despite the fact I'm using a Domain Admin account, I've verified I CAN in fact connect to that share with that account and the Windows firewall if off on all the servers.
I can't see what the problem is!

Is it because the server running Veeam B&R is 2012R2 and the Hyper-V hosts are 2008R2??
I need to get this running as a proof of concept to get funding for the full version.