Warning: Math is involved in this post.
Microsoft Dynamics GP 2016 R2: Receivables Management Credit Limit warning fails may not work all the time – Microsoft Dynamics GP Community
Payables & ReceivablesMicrosoft & the GP EcosystemGP 2016
Archived post from 2017. Dynamics GP and the links it points to have changed since; check current documentation before relying on version-specific steps.