Asp.net 获得；由于对象的当前状态，操作无效；Exchange命令出错

我有一个ASP.NET 3.5应用程序运行Powershell脚本来添加/更新Exchange邮箱。大多数Powershell命令都工作得很好，但到目前为止有两个命令导致了错误：get calendarprocessing和set calendarprocessing，这两个命令获取或设置分配给安排房间的用户。错误为System.Management.Automation.CmdleInvocationException:由于对象的当前状态，操作无效。当我从Exchange命令行管理程序运行命令时，它们工作正常。我们已修补并重新启动Exchange服务器

命令示例： 获取calendarprocessing Room.1 |选择-展开bookinpolicy（或类似变体）

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看看这是否有帮助：不，不幸的是没有帮助。这发生在web服务中，但我确实在测试web应用程序中添加了这些web.config设置，以防万一。更新：我让某人在服务器上重新安装了Exchange，然后它就工作了。

Private Function RunScript(ByVal ScriptFileName As String, ByVal Arguments() As String) As Collection(Of PSObject)
    Dim sb As New StringBuilder
    Dim strScript As String

    ' create Powershell runspace and open
    If psRunspace Is Nothing Then
        psRunspace = InitializeRunspace()
    End If

    'Grab Powershell script from text (.ps1) file
    strScript = File.ReadAllText(ScriptFileName)

    'inject the arguments into the script
    strScript = InsertArguments(strScript, Arguments)
    Logging.LogMessage(strScript)

    'Open the runspace and create a pipeline if it's not already open
    If psRunspace.RunspaceStateInfo.State = RunspaceState.BeforeOpen Then
        psRunspace.Open()
    End If

    Dim MyPipeline As Pipeline = psRunspace.CreatePipeline()
    MyPipeline.Commands.AddScript(strScript)

    Try
        Dim psResults As Collection(Of PSObject)
        psResults = MyPipeline.Invoke()     'ERRORS HERE       

        Return psResults

    Catch ex As Exception
        Logging.LogMessage(ex.Message)
        Throw ex
    End Try

End Function