Hello everybody! I have a problem with a connection with an exchange server. I'm trying to use the ResolveName method to get the e-mail of a user from active directory. After creating the ExchangeServiceBinding object and set the url from the server, I call the method and it's returns a 401 Error, not authorized. If I copy the url to a Internet explorer page and set the same credentials as I use on the code, I can access to the web service. This is my code esb.RequestServerVersionValue = new RequestServerVersion(); esb.RequestServerVersionValue.Version = ExchangeVersionType.Exchange2010; esb.Credentials = new NetworkCredential("user", "pass"); esb.Url = "https://myserver/ews/Exchange.asmx"; ResolveNamesType rnType = new ResolveNamesType(); rnType.ReturnFullContactData = true; rnType.UnresolvedEntry = "nameToResolve"; // Resolve names. ResolveNamesResponseType resolveNamesResponse = esb.ResolveNames(rnType); I'm stuck with this problem too much time, I appreciate your help. Thanks in advance!!

Hi, I recommend that you ask this in the Exchange Dev Forum Topics discussed include: Web services, APIs, application conversion and apps in general Martina Miskovic

Thanks Martina, I have asked on that Forum, I hope to get any clue about my problem