Disable guest aplication interaction during Host level backup

Hi,
I have a 3 nodes Hyper-V Cluster, the hosts are Windows 2012 R2 Datacenter.
Some of my guests are Windows Server 2008 R2 with Exchange 2010.
When i backup the Exchange VMs the guest is aware of the backup and it flush the transaction logs.
I want to disable this feature. Every solution I found refers to this KB:
http://support.microsoft.com/kb/975354
but this KB refers to Windows Server 2008 R2 Hyper-V host, I'm not sure that it applies also to Windows 2012 R2 Hyper-V hosts.
Is there somebody that tried on Windows Server 2012 Hyper-V host? Does it still apply?
Roberto
Roberto Ferazzi
Microsoft® MVP Exchange Server
Moderator in the Microsoft TechNet Forums
My MVP Profile
MSExchange.Community

Hi Sir,
That registry should work , please refer to the answer of this similar thread :
https://social.technet.microsoft.com/Forums/en-US/0f782ec5-489a-473c-893b-e260455d75cd/dpm-2012-r2-windows-server-2012-r2-hyperv-exchange?forum=dpmhypervbackup
Best Regards,
Elton Ji
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