DFS Issues, where's Powershell's Get-DfsnRoot?

I'm having some DFS access issues.  Articles like

"How to configure DFS to use fully qualified domain names in referrals" Article ID: 244380

talk about using Get-DfsnRoot in Powershell to switch to DNS FQDN name types.  And the article says it applies to Windows 2008 SP2 and above.  So, I upgraded my Powershell to 3.0 on my W08R2SP1 box but Get-DfsnRoot is not there.  What do I have to do to get this functionality in Powershell?

Thanks!