Business rule
A no-code field-level logic mechanism in Dataverse — set value, lock field, show error, recommend value, with conditions and triggers.
A business rule in Dataverse is a no-code mechanism for adding field-level logic to forms. The graphical designer lets makers configure conditions on field values and actions to take when the conditions are met — set a default value, lock a field, change its required status, show an error message, hide a section, suggest a value (recommendation). Business rules can scope to a single form or to the entire table; entity-scoped rules run both client-side and server-side, enforcing logic even on API writes. Limits: single-table only (no cross-table references), no external calls, no complex iteration. For richer logic, use Power Automate flows, JavaScript via the Client API, or plug-ins. Business rules are the right tool for the common "if X then require Y" pattern.