The latest Feature of the Day is the Microsoft Dynamics Security Synchronization Utility. This allows the synchronizing of roles across GP, Business Portal and Web Services.
Microsoft Dynamics GP 2010 R2 Feature of the Day: Microsoft Dynamics Security Synchronization Utility
Tips & Hidden FeaturesInstall, Upgrade & AdminGP 2010
Archived post from 2011. Dynamics GP and the links it points to have changed since; check current documentation before relying on version-specific steps.