EWS Get organizer email from GetUserAvailabilityRequest

Question

I'm calling EWS and requesting the User Availability of a room. My response looks like this

<CalendarEvent>
   <StartTime>2015-01-27T16:00:00</StartTime>
   <EndTime>2015-01-27T17:00:00</EndTime>
   <BusyType>Busy</BusyType>
   <CalendarEventDetails>
      <ID>0000000001FC1580D0DA344...</ID>
      <Subject>John Doe</Subject>
      <Location>room-d2-2pers</Location>
      <IsMeeting>true</IsMeeting>
      <IsRecurring>false</IsRecurring>
      <IsException>false</IsException>
      <IsReminderSet>false</IsReminderSet>
      <IsPrivate>false</IsPrivate>
   </CalendarEventDetails>
</CalendarEvent>

I can see who booked the room and I can see an ID of the meeting. I would like to get the email of the Subject, which has booked the room. I've tried a GetItem request with the ID, but I get an error stating the ID is malformed. How do I get the email of the Subject? Is it even possible?

Answer 1

With the ItemId your trying to use that is the HexEntryId (PR_EntryId Property) of the appointment so if you do want to bind to the Calendar Item (and you have the rights to do so) you would need to covert it to an EWSId first eg

</soap:Header>
<soap:Body>
  <m:ConvertId DestinationFormat="EwsId">
    <m:SourceIds>
      <t:AlternateId Format="HexEntryId" Id="00000000BE1CDD3D9606274890F3DE4B7DDFB....." Mailbox="mailbox@blah.com" />
    </m:SourceIds>
  </m:ConvertId>
</soap:Body>

Cheers Glen