public static void Run() { try { // Set mailboxURI, Username, password, domain information string mailboxUri = "https://ex2010/ews/exchange.asmx"; string username = "******"; string password = "******"; string domain = "ex2010.local"; NetworkCredential credentials = new NetworkCredential(username, password, domain); IEWSClient client = EWSClient.GetEWSClient(mailboxUri, credentials); // ExStart:ExpandPublicDistributionList MailAddressCollection members = client.ExpandDistributionList(new MailAddress("*****@*****.**")); foreach (MailAddress member in members) { Console.WriteLine(member.Address); } // ExEnd:ExpandPublicDistributionList } catch (Exception ex) { Console.WriteLine(ex.Message); } }