Make calls to Outlook Rest API with Identity Token RRS feed

  • Question

  • Hey all , 

    I create some add-in for outlook in JS and I want to also make calls for outlook rest API for things I couldn't do with js API: 

    I see this tutorial about outlook rest API:

    So , I try for example just get a message , and for this I need some access token . I see this method:

    And I success to get some token ... but I don't know if it's enough or if it's right...

    When I send request for outlook resp API I get 2 erros:

    1. 401 unauthorized

    2. XMLHttpRequest cannot load .... No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin  is therefore not allowed access. The response had HTTP status code 401.

    Code sample:

       function getIdentityToken() {
        function getAsyncToken(asyncResult) { 
            var userIdentityToken = asyncResult.value;
            var xhr = new XMLHttpRequest();
            var ewsId = myMessageId;
            var restId = Office.context.mailbox.convertToRestId(ewsId, Office.MailboxEnums.RestVersion.v2_0);
  "GET", "" + restId, true);
            xhr.setRequestHeader("Content-type", "application/json");
            xhr.setRequestHeader("Access-Control-Allow-Origin", "*");
            xhr.setRequestHeader("Access-Control-Allow-Credentials", true);
            xhr.setRequestHeader("Authorization", "Bearer " + userIdentityToken);
            xhr.onreadystatechange = function () {
                if (xhr.readyState == 4) {
                    if (xhr.status == 200) {

    Did this way is right ? or I Must do all the levels described on link?

    Thanks all!

    Sunday, February 5, 2017 11:55 AM

All replies

  • Hi,

    This forum is for Office JS API, since your issue is related to Office 365 REST API, I would move this thread into the following forum:

    Thanks for your understanding.



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    Monday, February 6, 2017 2:21 AM
  • Hi,

    You get these errors because the App that you are creating needs to be registered and authorized inside Azure AD. You can check the following articles for more information: 

    Regards, Sjoukje

    Please remember to click 'Mark as Answer' on the post that helps you.

    Monday, February 6, 2017 5:06 PM
  • Hey , Thanks . 

    I success to get right access token by the 'send box':

    and then with access token I success to make request to outlook rest API .

    But,How could I do this on my add-in ?

    I register my app at : and set there all premissons I want ,now in my add-in I need to ask again for premonitions or I can use getAsyncToken method ??? when I try with getAsyncToken I still get same errors.

     function getAsyncToken(asyncResult) { 
            var userIdentityToken = asyncResult.value;

    I try take the application ID from the portal I sign-up and set it in the manifest:

      <Id>my id ................</Id>

    But,now when I get the access token again with getAsyncToken method I still get same errors.

    I am not understand how could I get valid token in my add-in for make request to outlook rest API ?

    Thanks again !

    Tuesday, February 7, 2017 10:49 AM
  • Hi,

    The following article provides you with all the information you need on creating Outlook Add-ins. There is also sample code on how to work with AccessTokens:

    Regards, Sjoukje

    Please remember to click 'Mark as Answer' on the post that helps you.

    Thursday, February 16, 2017 9:57 AM
  • Hey , it's great thanks.

    I success to make outlook rest API request from my add-in with that(for example get some message) but I have 2 problems :

    1.  I can't add attachment with outlook rest API call to message :" + itemId +"/attachments

    The error I get is:

    {"error":{"code":"ErrorAccessDenied","message":"The api you are trying to access does not support item scoped OAuth."}}

    I try to set this 2 different permissions (every time another) in my manifest file but it's still same error..


    How could I add attachment via call to outlook rest API from my add-in ?

    2.  Sometimes the call  of getToken work and return access token and sometimes return error , I don't know also what the reason:

    Office.context.mailbox.getCallbackTokenAsync({ isRest: true }, function (result){})

    Hope you could help me , thanks again you are great !

    • Edited by ADD-IN123456 Thursday, February 23, 2017 12:56 PM
    Thursday, February 23, 2017 12:53 PM
  • Hi,

    Here you can find a sample of sending a message with an attachment:

    Can you provide the complete method for the token? Thanks!

    Regards, Sjoukje

    Please remember to click 'Mark as Answer' on the post that helps you.

    Wednesday, March 1, 2017 1:20 PM
  • I had same problem yet .. I post a question is stack overflow:  and tell me this is a bug,but nothing change! same error {"error":{"code":"ErrorAccessDenied","message":"The api you are trying to access does not support item scoped OAuth."}}

    anyone can help ? tnx!

    Wednesday, July 5, 2017 10:23 AM