title: Use less than or equal in odata msgraph
body: <p>I'm currently working on calendar events and I'd like to get events only between two included dates. 
  I would like to use the comparison operator 'le' in the msgraph api, but it does not work correctly. It seems it is working like a 'lt'. I have no problem with 'ge'.</p>
  
  <p>Here is my json events start/end date:</p>
  
  <pre><code>"start": {
      "dateTime": "2017-06-13T12:00:00.0000000",
      "timeZone": "UTC"
  },
  "end": {
      "dateTime": "2017-06-13T15:00:00.0000000",
      "timeZone": "UTC"
  }
  </code></pre>
  
  <p>Here is my query: </p>
  
  <pre><code>https://graph.microsoft.com/v1.0/groups/{groupId}/events?$filter=(start/dateTime ge '2017-06-13' and end/dateTime le '2017-06-13')
  </code></pre>
  
  <p>This query returns nothing! I tried with only start or end date but it's the same result.</p>
  
  <p>Can anyone tell me what’s wrong with this issue?</p>