get public folder size SBS 2011 Exch 2010 PS ver 2

[Billz66]

I have been trying to generate a report on our public folder sizes using pwershell

It was suggested that i run this but i dont think this is available on our version of powershell
Get-PublicFolderStatistics | fl Name,DatabaseName,TotalAssociatedItemSize

[PS] C:\Windows\system32>Get-PublicFolderStatistics | fl Name,DatabaseName,TotalAssociatedItemSize
The term 'Get-PublicFolderStatistics' is not recognized as the name of a cmdlet, function, script file, or operable pro
gram. Check the spelling of the name, or if a path was included, verify that the path is correct and try again.
At line:1 char:27
+ Get-PublicFolderStatistics <<<< | fl Name,DatabaseName,TotalAssociatedItemSize
+ CategoryInfo : ObjectNotFound: (Get-PublicFolderStatistics:String) [], CommandNotFoundException
+ FullyQualifiedErrorId : CommandNotFoundException



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