'Autodiscover service couldn't be located' when trying to access Exchange 2010 account with EWS MANAGED API

Question

I am using Auto discover service Url for a specified e-mail address.

ExchangeService Service = new ExchangeService(ExchangeVersion.Exchange2010);
Service.Cr         


        

Answer 1

try to use this:

Service.Credentials = new WebCredentials("john", "12345678", "MYDOMAIN");

NOT this one

Service.Credentials = new WebCredentials("john@mail.com", "12345678", "MYDOMAIN");

notice the username is 'john' NOT 'john@mail.com',It blocked me for quite a few hours for using the second one....