Simple way to authenticate the user against SharePoint online 365

// first of all we need to pass the user name and password to SharePoint online credentials constructor like below

//here again password we need to pass as a system.security.Securesetting

SharePointOnlinieCredentials onlineCredential = new SharePointOnlineCredential( _userName , mySecurePassword);

//we need to get the authentication cookie by passing the URL of the web service

string authCookie = onlineCred.GetAuthenticationCookie(_adminUrl);

// We need to Create a CookieContainer to authenticate against the web service

CookieContainer authContainer = new CookieContainer();

// now Put the authenticationCookie string in the container

authContainer.SetCookies(_adminUrl, _authCookie);

// we must Setting up the user profile web service

UserProfileWS.UserProfileService upService = new UserProfileWS.UserProfileService();

// assign the correct url to the web service

upService.Url = _adminUrl.AbsoluteUri;

// and finlally we need to Assign previously created auth container to web service

upService.CookieContainer = authContainer;

and that’s it we are good to go, happy coding

About Krishana Kumar

Krishana Kumar is SharePoint Architect/Trainer having Architecture experience with high volumes at Enterprise level and global scale - creation of highly scalable solutions with global user base and geographically distributed architectural components. Good knowledge of SharePoint best practices and governance models. I hold Two Master degree in Computer Science with over 11 years of experience working on Microsoft Technologies specially SharePoint, Project, .NET and other Information Worker Technologies. Having good exposer in Client side scripting Angular.js, backbone and Node. I am currently responsible for SharePoint Infrastructure set up and leading teams in various medium and large scale projects, architecting, designing & installing SharePoint farms, developing custom components,, and providing advanced SharePoint administration and development training to teams and customers. I regularly speaks in various SharePoint User Groups and other Events. I have MCSA Windows Azure, MCSA Office 365, MCSE & MCSD SharePoint 2013, Microsoft Certified Developer (MCD) and holds MCPD, MCTIP and MCTS for SharePoint 2010, MCTS MOSS 2007 & WSS 3.0, MCPD, MCITP (EPM 2010 & 2007) and MCSD .NET.
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