PHP Exchange Server 2007 SMTP, NTLM Authentication Server

Question

I am trying to connect to a hosted Exchange setup on sherweb.com via. PHP using SMTP with NTLM authentication. When connecting, I need to enter the NTLM authentication area.

I get the following error from a PHP script, "The requested credential workstation is not defined." I am using the SMTP class and SASL class from phpclasses.org to authenticate NTLM.

How to find NTLM authentication scope? Tech. Support on sherweb.com is like talking to a brick wall, if it’s not in their knowledge base, then they don’t have a clue.

UPDATE

I understand that I can use the Exchange 2007 web services, but I tried a few code examples and it seems Exchange WDSL has errors. Essentially, I would rather use SMTP, if possible, through. NTLM auth.