Unable to turn AD FS authentication on the OWA virtual directory

I am trying to set up AD FS authentication with the owa virtual directory while following this TechNet article:

http://technet.microsoft.com/en-us/library/dn635116(v=exchg.150).aspx#party

I have successfully gotten the ECP virtual directory to authenticate against the AD FS & AD howecver when I try to configure the OWA virtual directory I receive an error message while setting the field to true:

[PS] C:\Windows\system32>Get-OwaVirtualDirectory | fl AdfsAuthentication


AdfsAuthentication : False



[PS] C:\Windows\system32>Set-OwaVirtualDirectory -AdfsAuthentication $true
A parameter cannot be found that matches parameter name 'AdfsAuthentication'.
    + CategoryInfo          : InvalidArgument: (:) [Set-OwaVirtualDirectory], ParameterBindingException
    + FullyQualifiedErrorId : NamedParameterNotFound,Set-OwaVirtualDirectory
    + PSComputerName        : adfs.vaultiveps.com

[PS] C:\Windows\system32>

I have used the full command mentioned in the technet article but I received same results....

Is there a workaround to get OWA to authenticate against AD FS?