In a new Feature of the Day for GP 2013 SP2, Microsoft shows off some Vendor Tools
Microsoft Dynamics GP 2013 Service Pack 2 Feature of the Day: Vendor Tools – Inside Microsoft Dynamics GP
Tips & Hidden FeaturesPayables & ReceivablesInstall, Upgrade & AdminGP 2013
Archived post from 2013. Dynamics GP and the links it points to have changed since; check current documentation before relying on version-specific steps.