Connection to Office 365 by EWS API

Question

I am using EWS API in my console application to process mailbox items and my connection script looks like

ExchangeService service = new ExchangeService(ExchangeVersion.Exchange2007_SP1);
service.UseDefaultCredentials = true;
service.AutodiscoverUrl("[email protected]");

But i found that my email account was moved to Office 365 cloud. How should i change the authentication ?

i found EWS service url

 service.Url = new Uri("https://outlook.office365.com/EWS/Exchange.asmx");

but i dont know how to use it.

Thank you

Answer 1

You can use the code below to connect to the EWS on office 365:

ExchangeService service = new ExchangeService(ExchangeVersion.Exchange2013_SP1);

service.Credentials = new WebCredentials("[email protected]", "password");
service.AutodiscoverUrl("[email protected]", RedirectionUrlValidationCallback);

You need define one callback function for the AutodiscoveryUrl function, like this:

private static bool RedirectionUrlValidationCallback(string redirectionUrl)
{
    // The default for the validation callback is to reject the URL.
    bool result = false;

    Uri redirectionUri = new Uri(redirectionUrl);

    // Validate the contents of the redirection URL. In this simple validation
    // callback, the redirection URL is considered valid if it is using HTTPS
    // to encrypt the authentication credentials. 
    if (redirectionUri.Scheme == "https")
    {
        result = true;
    }
    return result;
}