Currently, I read this document. The following is the link: Document here the title is “Microsoft Dynamics NAV and SQL Server 2005 Communication” It explains the relationship between the Navision 4.0 SP1 and SQL2005. In the microsoft business solutions default site, it said SQL 2005 is compatible with navision. However, based on the document, some functions do not supported in SQL 2005, for example, business notification and commerce portal. I am really confused by Microsoft.