The Microsoft Dynamics CRM 2015 Release Preview Guide outlines key features and updates for Microsoft Dynamics CRM 2015, Dynamics CRM Online, Dynamics Marketing, and Microsoft Social Listening. It emphasizes the importance of bridging marketing and sales for better customer engagement, while detailing enhancements in marketing automation, sales processes, customer service capabilities, and platform improvements. The document is a high-level overview designed to inform stakeholders about the upcoming features and their potential impact on customer experiences.