Ian is like an Energizer Bunny, his series goes on and on and on. Hands On With Microsoft Dynamics GP 2015 RTM: Web Services Security Verification
Hands On With Microsoft Dynamics GP 2015 RTM: Web Services Security Verification | azurecurve
Install, Upgrade & AdminDevelopment & IntegrationMicrosoft & the GP EcosystemGP 2015
Archived post from 2014. Dynamics GP and the links it points to have changed since; check current documentation before relying on version-specific steps.