When working with marketing forms in Dynamics 365 for Marketing, you may encounter a “To create a Lead, the Status Reason (statuscode) field should be included in your form and marked as required.” error notification.

This error notification occurs when the Status Reason (statuscode) field on the Lead entity has a field requirement value of Business Required. To resolve this issue, navigate to Settings > Customizations > Customize the System > Entity > Lead > Fields, and change the field requirement value of the Status Reason (statuscode) field to Optional.