SQL Server Compact 3.5 Server Tools installs replication components on the IIS server enabling merge replication and remote data access (RDA) between SQL Server Compact 3.5 database on a Windows Desktop & Mobile devices and database servers running SQL Server 2005 and later versions of SQL Server 2005. This install is not required for Sync Services for ADO.NET
SQL Server Compact 3.5 Server Tools cannot be installed Side-by-Side on the same IIS server with previous versions of SQL Server 2005 Compact Edition Server Tools or with SQL Server 2005 Mobile Edition Server Tools. Using SQL Server Compact 3.5 Server Tools you can synchronize between these previous versions of the client database and SQL Server 2005 and later version of the server product.
Microsoft, SQL Server Compact 3.5 Server Tools, Beta 2, Beta, Software, Download