Dynamics Community Forum Thread Details

Prefill registration form and 30 day limit

I know from Microsoft Prefill values for forms and event registration - Dynamics 365 Customer Insights | Microsoft Learn, that the link/token will only allow a form to be prefilled for 30 days for marketing/event forms.

We normally send out emails 2-3 months prior to an event, and clients will often still register at the last minute - I want to avoid them clicking on the link after 30 days and finding themselves presented with a blank form and attempting to fill it in, and then the system failing to match the registration to the existing contact record and instead creating a second record.

Is their anyway that we can configure that 30 day period, even if it's a system wide setting? Or does anyone have any other suggestions - perhaps even a way to have the form recognise it's not prefilled and display a warning/message/redirect?

Categories:

Dynamics 365 Customer Insights - Journeys

Outbound to Real-Time Transition

Good morning, afternoon, or evening – depending on where you are in the world!
This issue you are describing—where prefilled registration form links expire after 30 days—is a known limitation in Dynamics 365 Customer Insights - Journeys.
Here’s what you need to know:

The prefill token embedded in the form URL (e.g., msdynmkt_prefill) is only valid for 30 days [1].
After 30 days, the form will no longer prefill, and the user will see a blank form.
If the user submits the blank form, it may result in a duplicate contact record, especially if matching rules aren’t strict.

Unfortunately, this 30-day limit is not configurable—there is no system-wide setting to extend the token’s lifespan [1].
Recommended workarounds:

Send reminder emails with a fresh prefilled link closer to the event date (e.g., 2–3 weeks out).
Use a custom landing page that detects when a form is not prefilled and displays a warning message or redirects the user to a support/help page.
Implement duplicate detection rules in Dataverse to catch and merge potential duplicate contacts created from blank form submissions.
Use progressive profiling to gradually build contact data over time, reducing reliance on a single prefilled form [2].