'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

I experienced the same problem with Exchange 2013. In my case the cause was a Default Proxy declaration in my config file, which probably prevented the Autodiscover service to work correctly.

<system.net>
    <defaultProxy enabled="true">
      <proxy proxyaddress="http://localhost:8888" bypassonlocal="False"/>
    </defaultProxy>
</system.net>

After commenting the <defaultProxy> tag, autodiscover was able to find the service Url.

Answer 2

I have used direct:

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

and it worked for me. You may try use Fiddler and eM Client to see how they use EWS Managed API to get things done and replicate calls.

Answer 3

You got Service.Credentials wrong, use it like this:

Service.Credentials = new WebCredentials(username, password, domainname);

Using domain credentials, not the email address.

Also doublecheck the following:

1. The version you specify in new ExchangeService() matches server's
2. the parameter passed to Service.AutodiscoverUrl(); is correct (email address which data needs to be fetched)

The following works for me (in a new Console Application):

// Tweaked to match server version
ExchangeService Service = new ExchangeService(ExchangeVersion.Exchange2007_SP1); 

// Dummy but realistic credentials provided below
Service.Credentials = new WebCredentials("john", "12345678", "MYDOMAIN");
Service.AutodiscoverUrl("john.smith@mydomain.it");
Folder inbox = Folder.Bind(Service, WellKnownFolderName.Inbox);
Console.WriteLine("The folder name is " + inbox.DisplayName.ToString());

//Console output follows (IT localized environment, 'Posta in arrivo' = 'Inbox')
> The folder name is Posta in arrivo

Answer 4

I will recommend to you to enable Traces,to achieve this follow :

     Service.TraceEnabled = true;

I was facing the same issue then when I enabled traces these traces will guide you what exactly is happening.In my case SSL certificate issue is there to solve it i followed following post

There can be many issue such as:

• User can be blocked.
• The DNS can't find autodiscover.domain.com.

Answer 5

Check if the password for this email has expired.

If the password has expired you receive this error from AutoDiscover.