With the use of SAML 1.1 protocol, the password and username would be passed on for the requested token from STS. This is not required if you are using SharePoint Online or using the web browser because in this case you are either already authenticated and it is the web browser that handles all the authentication with the use of active authentication.

How to use Client Object Model with Office 365 from a remote client

There is huge rise in demand for various SharePoint development services which include services like SharePoint customization, SharePoint consulting, development of customized web parts, customized migration, troubleshooting implementation issues and much more. For accessing sharepoint objects programmatically you need to active authentication by using client object model, web services or WebDAV from outside of Office 365. Adding cookies and user agent would be just fine.

context.ExecutingWebRequest += claimsHelper.clientContext_ExecutingWebRequest;

This article gives you the details of performing active authentication to SharePoint online in Office 365. How would the code look? There are some helper class originated from Steve “SharePoint Claims” Peschka.

Show me the code to get the cookies!

MsOnlineClaimsHelperclaimsHelper = new MsOnlineClaimsHelper(url, username, password);

To invoke methods on SharePoint online with the use of Client Object Model (CSOM), web services or WebDAV we need to authenticate first. After the validation the token will return two cookies which must also be passed with all requests to SharePoint.


Let us get to the core of this article. HTTP is used by P-subscriptions while communicating and HTTPS must be used by E-subscriptions.

Console.WriteLine(“Name of the web is: ” + context.Web.Title);. Along with SharePoint development the developers can also help their customers to define and analyse their application requirements, guide them through different techniques for integrating business requirements and execute it over a set which is well planned.

SharePoint Online active AuthN basics

It is also very important to be aware of which Office 365 subscription that you are targeting. When using manually the WebRequest objects then the same procedure is used. While it works fine on P-subscriptions but doesn’t harm if added. The first step would be to request a token from STS which is located at login.microsoftonline in Office 365. After having the cookies the next step would be to create a Cookie Container object in which cookies can be added. Then the cookie container should be added to the request done by Client object model and for this an even called Executing web Request can be used. Here is a simple example for it:

Let us see and understand how the code works before going deep into the actual code. Next step would be to pass along the cookies for each request. STS returns the security token if authentication is successful and token is then sent to SharePoint. It should also be noted that a User Agent of the request to a new value.


using (ClientContext context = new ClientContext(url))

You may use the helper class called MsOnlineClaimsHelper. It contains everything you might need for authentication, retrieving and caching the cookies and piggyback the cookie container on the CSOM web requests. If the user agent is not set then a 403 forbidden error is thrown by SharePoint Online in the case of an E-subscription. This is a responsible method for creating cookie container more on this one later