var contactList = sourceOutlookAddinServer.RequestContactListEx(Properties.Settings.Default.SmarterMailUser,                                      Properties.Settings.Default.SmarterMailPassword, userName);

if ( contactList.ResultCode == 0 )
{
    foreach (var contactInfo in contactList.List)
    {
        var contact = sourceOutlookAddinServer.GetContactEx(Properties.Settings.Default.SmarterMailUser, Properties.Settings.Default.SmarterMailPassword, userName, contactInfo.Guid);

        if (contact.ResultCode == 0)
        {
            ExContactItem newContact = new ExContactItem();
            newContact.key = new SmarterMailOutlookAddin.ArrayOfString();
            newContact.val = new SmarterMailOutlookAddin.ArrayOfString();

            for (int i = 0; i < contact.ExContact.key.Count; i++)
            {
                if (!string.IsNullOrWhiteSpace(contact.ExContact.val[i]))
                {
                    newContact.key.Add(contact.ExContact.key[i]);
                    newContact.val.Add(contact.ExContact.val[i]);
                }
            }
            var result = destinationOutlookAddinServer.AddContactEx(Properties.Settings.Default.SmarterMailUser, Properties.Settings.Default.SmarterMailPassword, userName, newContact);
        }

The result returns -2, Object reference not set to an instance of an object

The newContact is not null. It has values.

The destinationOutlookAddinServer is not null. It is valid.

The user is valid, and that user does exist on the destination server.

I even tried passing in the contact.ExContact into the AddContaqctEx call. Same result. Null reference exception.

What am I missing?