Does https://campaign-us-1.goacoustic.com Support for DigiCert root and intermediate certificate

Hello Team, 

Does https://campaign-us-1.goacoustic.com trust DigiCert root and intermediate certificates? Just to give some background, we have been using https://campaign-us-1.goacoustic.com endpoint for Acoustic Campaign service. Our Apigee server certificate is going to get updated soon this month, and they want Acoustic to have DigiCert root and intermediate certificate at Acoustic end.

Any help would be appreciated.

Thank you.