RDP to Server 2012 System Fails, Unless we "wake" the server using VCenter

I have multiple Server 2008 R2 in our VMWare 5.0 environment. I have been using RDP to manage them for years without any issues.

I have recently added our first two virtual Server 2012 systems to our server farm.

I can RDP to these servers without issue, unless they have been "idle" for a while. Then I get the
"Remote Desktop can't connect to the remote computer for one of these reasons:" error.
If I open a console session with VCenter and just get a screen up (I don't need to log in), I can then use RDP to connect to these systems.

I have changed the power settings for the NIC to not allow the system to shut it down. However, my experience with Windows 8 settings is this a USER setting, not a SYSTEM setting, so perhaps it is not in effect if no one is logged in?

Any help would be appreciated. Thanks!
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
We've seen this and it's a Power Management setting, which sleeps the OS (and the VM).

Disable Power Management Sleeping in the VM, one of our Admins, set it as a Group Policy.

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JCincyAuthor Commented:
So under Control Panel / Power Options:
    Put the computer to sleep: NEVER

I have made this change. I need to wait to confirm this resolves the issue.

Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
Yes, turn off all functions, and set to NEVER.

Not required on a server, on in a VM.
JCincyAuthor Commented:
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Windows Server 2012

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