Let's say I have 50 users that will connect to MS-SQL server with the ES, how many MS-SQL user licenses will I need to have?

Hi Ben,

What about "un-officially"?

This is where I then get confuse, since the client applications are not accessing the SQL server directly and the ES is the one with the connection to the server, then it looks to me that technically only one connection is made to the database by the ES.

http://www.microsoft.com/sql/howtobuy/multiplexing.mspx

"Sometimes organizations develop network scenarios that use various forms of hardware and/or software that reduce the number of devices or users that directly access or use the software on a particular server, often called "multiplexing" or "pooling" hardware or software. Use of such multiplexing or pooling hardware and/or software does not reduce the number of client access licenses (CALs) required to access or use SQL Server software. A CAL is required for each distinct device or user to the multiplexing or pooling software or hardware front end. This remains true no matter how many tiers of hardware or software exist between the server running SQL Server and the client devices that ultimately use its data, services, or functionality. "

-- Larry