[SOLVED] Setting request status via REST interface

I'm working on a pretty cool proof-of-concept with Microsoft Orchestrator and SDP. I'm using the REST interface to get-put information in the tickets.

Getting info is no issue, working perfectly.

Trying to set the 'Status' of a ticket however is proving difficult.

Using the example request below:

http://helpdesk/sdpapi/request/23515/?TECHNICIAN_KEY=1799FA64-4414-4A90-BC43-XXXXXXXXXX&OPERATION_NAME=EDIT_REQUEST&INPUT_DATA=<operation><details><parameter><name>status</name><value>Resolved</value></parameter></details></operation>

And the result is:

<?xml version="1.0" encoding="UTF-8" standalone="no" ?>
<API version="1.0">
<response>
<operation name="EDIT_REQUEST">
<result>
<statuscode>
       200
      
</statuscode>
<status>
       Success
      
</status>
<message>
       Request 23515 successfully edited
      
</message>
 </result>
</operation>
</response>
</API>

    Which seems to indicate a success, however the status never changes!
   
    I posted this as a support call a LOOOONG while ago but never had a decent resolution, I'm finally able to spend a bit of time on this again and would love to get it to work.
   
    Any help is greatly appreciated.