Butted heads with a developer buddy to come up with this naughty little number. Deletes any .ost from all profiles on the machine. Adding this run script just before we take the PCT looks like it will do the trick. Thanks!
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Set fso = CreateObject("Scripting.FileSystemObject")
Set objFolder = fso.GetFolder("C:\Documents and Settings")
Set colSubFolders = objFolder.Subfolders
For Each objSubfolder in colSubfolders
Dim folderLocation
folderLocation = "C:\Documents and Settings\" + objSubfolder.Name + "\Local Settings\Application Data\Microsoft\Outlook\"
If fso.FolderExists (folderLocation) Then
Set f = fso.GetFolder(folderLocation)
Set fc = f.Files
For Each objFile In fc
If fso.GetExtensionName(objFile) = "ost" then
fso.DeleteFile(objFile)
End If
Next
End If
Next
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