Is there a license required for integration?

Hello,

Sorry for the delay in response.

As you wish to integrate the Adobe Sign, you will need to Adobe Sign enterprise plan that includes the integration.

You may refer to the following help page to know more about the Adobe Sign plans: https://acrobat.adobe.com/us/en/sign/pricing/plans.html.

Let us know if you have any questions.

Thanks,

Meenakshi