title: EWS get Contacts - CustomerID & Account
body: <pre><code>ExchangeService service = this.GetService();
  FolderId folderID = GetPublicFolderID(service, "My Address Book");
  ContactsFolder folder = ContactsFolder.Bind(service, folderID);
  int folderCount = folder.TotalCount;
  
  var guid       = DefaultExtendedPropertySet.PublicStrings;
  var epdCP      = new ExtendedPropertyDefinition(guid, "CustomProp", MapiPropertyType.Boolean);
  var epdAccount = new ExtendedPropertyDefinition(guid, "Account", MapiPropertyType.String);
  var epdCID     = new ExtendedPropertyDefinition(guid, "CustomerID", MapiPropertyType.Integer);
  
  var view = new ItemView(folderCount);
  view.PropertySet = new PropertySet(BasePropertySet.FirstClassProperties);
  view.PropertySet.Add(epdCP);
  view.PropertySet.Add(epdAccount);
  view.PropertySet.Add(epdCID);
  var contacts = service.FindItems(folderID, view);
  
  foreach (Contact contact in contacts)
  {
      bool CP;
      string Account;
      int  CID;
  
      contact.GetLoadedPropertyDefinitions();
      contact.TryGetProperty(epdCP, out CP);
      contact.TryGetProperty(epdAccuont, out Account);
      contact.TryGetProperty(epdCID, out CID);
  
      Console.WriteLine(String.Format("{0, -20} - {1} - {2}"
                                      , contact.DisplayName
                                      , contact.EmailAddresses[EmailAddressKey.EmailAddress1]
                                      , CP
                                      , Account
                                      , CID
                              ));
  }
  </code></pre>
  
  <p>Goal is to get the Contact information out of a Public Address Book so I can sync it with another program we have.</p>
  
  <p>For each Contact in the Public Address Book, this prints out DisplayName, EmailAddress and my Custom Property. No issues there.</p>
  
  <p>The problem I have is I can't seem to get the right incantation to pull certain properties. CustomerID and Account are two examples that I can't seem to get to pull/print. They aren't "Custom", in as much as I haven't created them.</p>
  
  <p>How can I get CustomerID and Account out of a contact via EWS?</p>