Search Web Parts
You use the Search Web Parts to search both the e-commerce site and any static content, to display the search results, and enable your shoppers to page through several pages of search results.
We do not recommend using NTLM authentication in the extended zone your shoppers will use because some of the Default site functionality that requires a shopper log in will not function correctly when logging in under NTLM. This includes functions such as registration, profile management, login and logout, to name a few. This occurs because of a synchronization limitation of profile information between the Windows account, Commerce Server 2009, and SharePoint. However, primary browsing, shopping, and checkout functions are not affected.