In the Outlook web add-in, when something is not available directly from the Office.js library , you can try to access this data using Exchange Web Services.
Fortunately, Office.js provides two ways to access EWS.
- EWS SOAP . .
makeEwsRequestAsync Office.context.mailbox - EWS, . SDK, .
getCallbackTokenAsync Office.Context.mailblox, . , ( Office.js).
, EWS, , , .. , . .