We are trying to provide a web service in our organization to an external vendor to access our CRM Systems to get some information. The business functionality is enclosed in a RFC. Now i need to provide it as a web Service. I would like to know the answers for the following,
1. How do i create a provide Web Service? (If there is any step by step guide, it will be ideal).
2. What information does the external vendor need to access my web Services?
3. What is the general security constraints we need to look into?
We are in NW 7.0 with CRM 5.2.
Thanks in advance............