At Dynamics GP Land, Steve Endow looks at issues he had with a mysteriously disappearing Dex.ini file in The Curious Case of the Disappearing Dex.ini Data.
The Curious Case of the Disappearing Dex.ini Data
Install, Upgrade & AdminDevelopment & Integration
Archived post from 2010. Dynamics GP and the links it points to have changed since; check current documentation before relying on version-specific steps.