You can learn about the security best practices for Office 2010 applications by reading the following article, Security Best Practices for Office 2010 Applications, which was initially published in The Microsoft Security Newsletter (July 2011 Edition). I posted this here on the Office IT Pro Blog to make sure that those who have not subscribed to or yet seen the security newsletter are aware of this resource.

Ross Carter, CISSP (Office 2010 Security Resource Center on TechNet