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tuti
Implementing SSO with force.com
I've read the artical regarding this issue and I have some questions:
1. How can I enable sso?
2. I've got a standard 30 days trail account for SalesForce.com. Do I need a developer account also?
3. For what do I need the wsdl file?
Check out this Link
http://wiki.apexdevnet.com/index.php/How_to_Implement_Single_Sign-On_with_Salesforce.com
Check FQA section of this article.