Hubspot

Create the external id field for Formsort

In HubSpot, visit your Data Model.

Select a model to edit. Here we chose Contacts. Click View Details.

Next, click View Contact settings.

In Setup click Manage contact properties.

Click the orange Create Property button.

Here is an example property value that can be used:

Make sure Require unique values for this property is checked. The max-character limit needs to be at least long enough to support a UUID.

After filling out the properties, save the new field.