How do I fix a third-party app that says my Arvest account "does not exist" or is a "duplicate?"

Our recent system update includes enhanced security measures that block older connections to keep your data safe. If a third-party app shows one of these errors, it means their platform hasn't been updated to our new network paths yet. You can either give it some time and try linking your account again in 24-48 hours or contact your third-party app's customer service for additional guidance.