Catalog Web Parts
The Catalog Web Parts handle the retrieval of information from Commerce Server 2009 and display the relevant information on the Web Part.
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.