exchangelib - All steps in the autodiscover protocol failed

Question

I have a problem with using exchangelib in python. I try this example code:

from exchangelib import DELEGATE, Account, Credentials

creds = Credentials(
    username='xxxx\\username', 
    password="mypassword"
)

account = Account(
    primary_smtp_address='surname.name@xxxx.fr',
    credentials=creds, 
    autodiscover=True, 
    access_type=DELEGATE
)

# Print first 10 inbox messages in reverse order
for item in account.inbox.all().order_by('-datetime_received')[:10]:
    print(item.subject, item.body, item.attachments)

I tried differents usernames but nothing works and I have always the same error message :

AutoDiscoverFailed: All steps in the autodiscover protocol failed

By the way, just in case it could help, i tried to use the Exchange Web service coded for C# and it works perfectly fine with this creds, i can send a mail:

static void Main(string[] args)
{
    ExchangeService service = new ExchangeService(ExchangeVersion.Exchange2010_SP2);
    // The last parameter is the domain name
    service.Credentials = new WebCredentials("username", "password", "xxxx.lan");
    service.AutodiscoverUrl("surname.name@xxxx.fr", RedirectionUrlValidationCallback);
    EmailMessage email = new EmailMessage(service);
    email.ToRecipients.Add("surname.name@xxxx.fr");
    email.Subject = "salut ";
    email.Body = new MessageBody("corps du message");
    email.Send();
}

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;
}

Thanks in advance !

Answer 1

I finally succeed with this configuration:

from exchangelib import DELEGATE, Account, Credentials, Configuration

creds = Credentials(
    username="domain_name\\username", 
    password="password"
)

config = Configuration(server='mail.solutec.fr', credentials=creds)

account = Account(
    primary_smtp_address="my email address",
    autodiscover=False, 
    config=config,
    access_type=DELEGATE
)

For those who will have the same problem, you can find your domain_name by right-clicking on "Computer" and Properties. Username and Password are the one you use to connect to your company mailbox for example. For the server in Configuration, for me this one works: "mail.solutec.fr", where solutec is the name of my company and fr for France.

Looks like this autodiscover guy really doesn't like me ^^

Thanks for your help anyway and have a good day !