From Samuel Matthew comes a fix for Error : “The selected company is not configured as a company of the current Microsoft Dynamics GP system database. You must resolve the database configuration to log in to the company”
Error : “The selected company is not configured as a company of the current Microsoft Dynamics GP system database. You must resolve the database configuration to log in to the company”
SQL & DataInstall, Upgrade & Admin
Archived post from 2018. Dynamics GP and the links it points to have changed since; check current documentation before relying on version-specific steps.