title: PowerShell WSUS query won't use all Classifications
body: <p>I'm trying to automate some WSUS stuff using powershell!</p>
  
  <p>When I run this command:</p>
  
  <pre><code>Get-WSUSClassification -WSUSserver MyServer
  </code></pre>
  
  <p>The result is as expected: We have all these classifications:</p>
  
  <pre><code>Title              ID                                  
  -----              --                                  
  Applications       5c9376ab-8ce6-464a-b136-22113dd69801
  Critical Updates   e6cf1350-c01b-414d-a61f-263d14d133b4
  Definition Updates e0789628-ce08-4437-be74-2495b842f43b
  Driver Sets        77835c8d-62a7-41f5-82ad-f28d1af1e3b1
  Drivers            ebfc1fc5-71a4-4f7b-9aca-3b9a503104a0
  Feature Packs      b54e7d24-7add-428f-8b75-90a396fa584f
  Security Updates   0fa1201d-4330-4fa8-8ae9-b877473b6441
  Service Packs      68c5b0a3-d1a6-4553-ae49-01d3a7827828
  Tools              b4832bd8-e735-4761-8daf-37f882276dab
  Update Rollups     28bc880e-0592-4cbf-8f95-c79b17911d5f
  Updates            cd5ffd1e-e932-4e3a-bf74-18bf0b1bbd83
  Upgrades           3689bdc8-b205-4af4-8d4a-a63924c5e9d5
  </code></pre>
  
  <p>However: If I try to use any other than "All", "Critical", "Security", or "WSUS",</p>
  
  <pre><code> get-wsusUpdate -approval UnApproved -Classification "Drivers" -status Needed -updateserver MyWSUS
  </code></pre>
  
  <p>I get the following error:</p>
  
  <pre><code>Get-WsusUpdate : Cannot bind parameter 'Classification'. Cannot convert value "Feature Packs" to type "Microsoft.UpdateServices.Commands.WsusUpdateClassifications". Error: "Unable to match the identifier name Feature Packs to a valid enumerator name. Specify one of the following enumerator names and try again: All, Critical, Security, WSUS"
  </code></pre>
  
  <p>Any ideas?</p>