Hyper-V VM Backups

What are the best practices for backing up a VM domain controller and a member server thru Windows Backup?  Specifically, full backup from host or within VM?  Before loading updates or a new application do you take snapshots, export, or full backup?

Read that exporting a VM that is a domain controller is not recommended however, I know for some that is common practice as long as it doesn't exceed the USN time which is 60 days I believe.
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ZenVenkyConnect With a Mentor ArchitectCommented:
As your concern is taking backup before installing any software, you can use Windows Server Backup(Assume you are using 2008). Because you are taking backup for safty measures only. Also you'll restore before 60 days if require. So I suggest WSBackup.

Another method is.. disable outbound replication on the DC where you are trying to install new Apps, once you think it is fine then enable outbound replication.

repadmin /options +DISABLE_OUTBOUND_REPL
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David Johnson, CD, MVPConnect With a Mentor OwnerCommented:
Backing up the physical media is always the best but for ease of restore backing up the vm's individually is a good option.

I do weekly snapshots and also if there are to be any major changes it is nice to have the option to roll back in case of a problem.
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