Hi all, Situation: I have set the following RBAC Settings: New-ManagementRoleAssignment –Name:impersonationAssignment Attendant –Role:ApplicationImpersonation –User:contoso\iup_attendant Now I'm trying to test the Exchange Web Service using the EWSEditor with the following Settings: Service URL: https://exchange2010.contoso.com/EWS/exchange.asmx Specific Exchange version: Exch2010 Use following credentials: Username: iup_attendant, Password: *, Domain: contoso With this settings i'm trying to check the calendar settings of another person with the entered settings. As if i'm using the entered settings I'm getting the following Error Message after the Query for Dates. Exception details: Message: Client context header found but no request type found in SOAP header. Type: Microsoft.Exchange.WebServices.Data.ServiceResponseException Source: Microsoft.Exchange.WebServices ErrorCode: ErrorInternalServerError ErrorMessage: Client context header found but no request type found in SOAP header. Stack Trace: at Microsoft.Exchange.WebServices.Data.ServiceRequestBase.ProcessWebException(WebException webException) at Microsoft.Exchange.WebServices.Data.ServiceRequestBase.InternalExecute() at Microsoft.Exchange.WebServices.Data.ExchangeService.GetUserAvailability(IEnumerable`1 attendees, TimeWindow timeWindow, AvailabilityData requestedData,AvailabilityOptions options) at EWSEditor.Forms.AvailabilityForm.GetAvailabilityButton_Click(Object sender, EventArgs e) in D:\doozer\Forms\AvailabilityForm.cs:line 170 at System.Windows.Forms.Control.OnClick(EventArgs e) at System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent) at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks) at System.Windows.Forms.Control.WndProc(Message& m) at System.Windows.Forms.ButtonBase.WndProc(Message& m) at System.Windows.Forms.Button.WndProc(Message& m) at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m) at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam) Question, what do I have to do? Thanks for any advice, uerueluem

Hi uerueluem, Please seek the solution in the Development Forum, thanks: http://social.technet.microsoft.com/Forums/en-US/exchangesvrdevelopment/threads Frank Wang TechNet Subscriber Support in forum If you have any feedback on our support, please contact tngfb@microsoft.com Please remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.