A new device-validation check on Account Engagement-hosted forms helps you collect visitor information more securely. Now, when someone visits a form, eligible fields are pre-filled only if the visitor uses the same device on which the field information was last collected. Previously, the form showed pre-filled information across multiple devices.
Where: These changes apply to Salesforce Enterprise, Performance, and Unlimited editions with any Marketing Cloud Account Engagement edition.
When: This change is available on a rolling basis in February 2026.