Interface between an ERP system and a CRM system

Summary: - A bidirectional interface is needed between an ERP System and a CRM System (MiniCRM). The CRM System already has a REST API interface (we have the specs for that interface). The new interface will connect on the one side to the SQL Server behind the ERP System, an on the other side with the MiniCRM REST API interface. - The interface should run for Microsoft IIS 7.0 - The CRM System will access the interface as a web hook and needs a HTTPS endpoint on the interface. - The language behind the interface should be C#. Project will be in Microsoft Visual Studio or compatible environment. - ERP data will be stored / extracted from a SQL Server (in the same local network, but on a different machine in the deployment environment). SQL Server name, schema and credentials used for accessing the SQL Server should be parameterized (saved in configuration files). - CRM data will be accessed by the MiniCRM REST API interface.