Overview

Microsoft Exchange Server 2010 SP2 helps IT Professionals achieve new levels
of reliability with greater flexibility, enhanced user experiences, and
increased protection for business communications.

• Flexible and reliable - Exchange Server 2010 SP2 gives you the
  flexibility to tailor your deployment based on your company's unique needs and a
  simplified way to keep e-mail continuously available for your users.
• Anywhere access - Exchange Server 2010 SP2 helps your users get more
  done by giving them the freedom to securely access all their communications -
  e-mail, voice mail, instant messaging, and more - from virtually any platform,
  Web browser, or device.
• Protection and compliance - Exchange Server 2010 SP2 delivers
  integrated information loss prevention, and compliance tools aimed at helping
  you simplify the process of protecting your company's communications and meeting
  regulatory requirements.

http://www.microsoft.com/download/en/details.aspx?id=28190 - RTM Bits

http://technet.microsoft.com/en-us/exchange/hh563895  - Guidance

Microsoft Hosting and Cloud Services Technology Specialist team