Exchange 2016 Microsoft Unified Communications Managed APIhttps://i2.wp.com/windowstechblog.nl/wp-content/uploads/2016/11/Exchange-2016-Microsoft-Unified-Communications-Managed-API.png?fit=499%2C474&ssl=1https://i2.wp.com/windowstechblog.nl/wp-content/uploads/2016/11/Exchange-2016-Microsoft-Unified-Communications-Managed-API.png?resize=150%2C150&ssl=1Martien van Dijkit's all about Microsoft