Read Email From Mailbox Folders Using Microsoft Graph API

In my previous articles, I have written about retrieving emails from folders and fetching access tokens and users/groups, etc. I have added the links below for your reference. Please go through these before following the steps given in this write-up.

• How To Fetch Access Token
• Getting User Properties From Office 365 Using Microsoft Graph API
• Send Email Using Microsoft Graph API From SharePoint Online
• Upload And Set Office 365 Profile Image Using Microsoft Graph API
• Retrieve site collections and subsites using Microsoft Graph API
• Retrieve Mailbox Folders Using Microsoft Graph API

Retrieve Emails From Mail Folders

• EndPoint - https://graph.microsoft.com/v1.0/users/{{userid}}/mailFolders/{{Foldername}}/Messages
• Usage - It retrieves all your emails from a selected folder from your mailbox

Tested in the Graph Explorer, it returns the JSON data like below. In this article, we are going to retrieve emails from the Inbox folder.

https://graph.microsoft.com/v1.0/users/{{userid}}/mailFolders/Inbox/messages

It returns all the properties of the mail like From, To, CC, Subject, Body, Conversation Id, Weblink, and a lot more.

So let's see how to retrieve this programmatically using JavaScript.

Please follow my previous article, How to fetch access token, to authenticate your web application to fetch the access token and authenticate.

Step 1 - Fetch Access Token

AuthUrl: https://login.microsoftonline.com/{{tenant}}/oauth2/v2.0/token

Type: POST

var token; // Initialize Globally    
function requestToken() {    
    $.ajax({    
        "async": true,    
        "crossDomain": true,    
        "url": "https://howling-crypt-47129.herokuapp.com/https://login.microsoftonline.com/sharepointtechie.onmicrosoft.com/oauth2/v2.0/token", // Pass your tenant name instead of sharepointtechie    
        "method": "POST",    
        "headers": {    
            "content-type": "application/x-www-form-urlencoded"    
        },    
        "data": {    
            "grant_type": "client_credentials",    
            "client_id ": "8baf0301-27df-44b1-b4fe-7911b9a918de", //Provide your app id    
            "client_secret": "tZ76oVPN039WlWPoAp+1aICq66vs7oUtE4lhDQYwxGY=", //Provide your secret    
            "scope ": "https://graph.microsoft.com/.default"    
        },    
        success: function(response) {    
            log(response);    
            token = response.access_token; //Store the token into global variable    
        },    
        error: function(error) {    
            log(JSON.stringify(error));    
        }    
    })    
}

The successful response is below,

So now create a function "RetrieveMessagesFromFolder", then pass the access token into the header.

EndPoint

https://graph.microsoft.com/v1.0/users/{{userid}}/mailFolders/{{Folderid}}/Messages

Method

GET

Code

function RetrieveMessagesFromFolder() {    
    $.ajax({    
        method: 'GET',    
        url: "https://graph.microsoft.com/v1.0/users/[email protected]/mailFolders/Inbox/Messages",    
        headers: {    
            'Authorization': 'Bearer ' + token,    
            'Content-Type': 'application/json'    
        },    
    }).success(function(response) {    
           
        var data = response.value;  
         console.log(data);    
        //  data.map(function(folderinfo){  
        //      $('#display').append('<li>'+ folderinfo.displayName+ '</li>');  
        //  })  
        
          }).error(function(error) {});    
}

HTTP "200", success -- it returns the JSON data Below,

Then apply .map to iterate over the response and display it on the page

Full Code

<script src = "https://ajax.aspnetcdn.com/ajax/jQuery/jquery-3.3.1.min.js" > < /script>   < script type = "text/javascript" >  
    var token;  
$(document).ready(function() {  
    requestToken();  
});  
  
function requestToken() {  
    $.ajax({  
        "async": true,  
        "crossDomain": true,  
        "url": "https://howling-crypt-47129.herokuapp.com/https://login.microsoftonline.com/sharepointtechie.onmicrosoft.com/oauth2/v2.0/token", // Pass your tenant name instead of sharepointtechie      
        "method": "POST",  
        "headers": {  
            "content-type": "application/x-www-form-urlencoded"  
        },  
        "data": {  
            "grant_type": "client_credentials",  
            "client_id ": "8baf0301-27df-44b1-b4fe-7911b9a918de", //Provide your app id      
            "client_secret": "tZ76oVPN039WlWPoAp+1aICq66vs7oUtE4lhDQYwxGY=", //Provide your secret      
            "scope ": "https://graph.microsoft.com/.default"  
        },  
        success: function(response) {  
            console.log(response);  
            token = response.access_token;  
            //     console.log(token);    
            RetrieveMessagesFromFolder();  
        },  
        error: function(error) {  
            console.log(JSON.stringify(error));  
        }  
    })  
}  
  
function RetrieveMessagesFromFolder() {  
    $.ajax({  
        method: 'GET',  
        url: "https://graph.microsoft.com/v1.0/users/[email protected]/mailFolders/Inbox/Messages",  
        headers: {  
            'Authorization': 'Bearer ' + token,  
            'Content-Type': 'application/json'  
        },  
    }).success(function(response) {  
        var data = response.value;  
        console.log(data);  
        data.map(function(mailmessages) {  
            $('#display').append('<li>From: ' + mailmessages.from.emailAddress.address + ', </br></br> Subject: ' + mailmessages.subject + ', </br></br> Body: ' + mailmessages.body.content + '</li>');  
        })  
    }).error(function(error) {});  
}   
</script>     
<ul id = "display" >   
</ul>

The final result is on the screen below, I have bound the body content as HTML from the response

So now, we are able to retrieve the mail from the folders using Microsoft Graph API.

Here is the change that works well for system generated folders. If you need to retrieve the custom created folder messages from your mailbox, you need to pass the "mail folder id" instead of passing the generic folder name.

For an example, see below.

EndPoint: https://graph.microsoft.com/v1.0/users/{{userid}}/mailFolders/

Response

EndPoint: https://graph.microsoft.com/v1.0/users/{{userid}}/mailFolders/{{Folderid}}/messages

Response

Now, you are able to understand how to retrieve emails from the mail folders using Microsoft Graph API.

Happy SharePointing!