Retrieve Lync contact from a phone number in an UCMA application

Question

I have a C# managed Application that runs on a Lync 2013 Server and uses MSPL. I route every call from MSPL to the application and handle it there. Lync to Lync calls work fine and their to Header is in the form sip:user@domain.com. But when a call from outside the network (non-lync like mobile phone etc.) to the workphone of a Lyncuser is started, the Uri is like sip:+12341234@domain.com;user=phone (sip:[workphone]@domain). Passing this string to the Presence Retrieval function does not work.

var sips = new string[] { phone }; // The "To" number
presenceService.BeginPresenceQuery(sips, categories, null, null, null);

This always returns an empty result. How can I first retrieve the user associated with the phone number to get its presence?

Answer 1

I solved it this way:

public static UserObject FindContactBySip(string sip)
{
    return UserList.FirstOrDefault(u => u.HasSip(sip));
}

private static void InitFindUsersInAD()
{
    PrincipalContext ctx = new PrincipalContext(ContextType.Domain);
    var user = new UserPrincipal(ctx);
    user.Name = "*";
    var searcher = new PrincipalSearcher(user);
    var result = searcher.FindAll();

    var sipList = new List<string>();
    UserList = new List<UserObject>();

    foreach (var res in result)
    {
        var underlying = (DirectoryEntry)res.GetUnderlyingObject();
        string email = string.Empty, phone = string.Empty, policies = string.Empty;

        foreach (var keyval in underlying.Properties.Values)
        {
            var kv = keyval as System.DirectoryServices.PropertyValueCollection;
            if (kv != null && kv.Value is string)
            {
                if (kv.PropertyName.Equals("msRTCSIP-PrimaryUserAddress"))
                {
                    email = (kv.Value ?? string.Empty).ToString();
                }
                else if (kv.PropertyName.Equals("msRTCSIP-Line"))
                {
                    phone = (kv.Value ?? string.Empty).ToString();
                }
                else if (kv.PropertyName.Equals("msRTCSIP-UserPolicies"))
                {
                    policies = (kv.Value ?? string.Empty).ToString();
                }
            }
        }

        if (!string.IsNullOrEmpty(phone) && !string.IsNullOrEmpty(email))
        {
            var userobj = new UserObject(email, phone, policies);
            UserList.Add(userobj);
        }
    }
}

First I initialize the UserList (List // Custom class) from the AD. Then I call FindContactBySip and check if the provided SIP equals the Email or Phone of the User.