How to integrate AX 2009 to web portal

Hi Experts,

I need experts help here.

One of our client is using ax 2009 and there are using one web portal also. Both AX 2009 and Web Portal is integrated.

I want to understand the process. I am new to Web portal integration with AX 2009.

Please help me. Waiting for reply.

Urgent!!

Advance in thanks and Regards,

AXDeveloper