Our own Dani Richardson tackles a “Cannot connect to the Management Reporter Server. Do you want to specify a different server address?” error with Management Reporter over at DynamicsCare.
Management Reporter: “Cannot connect to the Management Reporter Server. Do you want to specify a different server address?” | Microsoft Dynamics AX, CRM & GP Blog
Microsoft & the GP EcosystemInstall, Upgrade & AdminReporting & BI
Archived post from 2011. Dynamics GP and the links it points to have changed since; check current documentation before relying on version-specific steps.