We have hybrid setup with MidSource and RT server hosted by Adobe(sub-domain delegation is already complete) . What's the way to implement DKIM and DMARC record in Campaign?

For a hybrid setup do we have to create support ticket? If yes, what are the steps that needs to be completed on marketing instance?

If not, then could you please elaborate on how to achieve this?

The link below from return path explains about creating DKIM but not sure how to implement this in Adobe campaign:

https://help.returnpath.com/hc/en-us/articles/222481328-How-to-set-up-DKIM-

Reference:

https://docs.campaign.adobe.com/doc/AC/en/technicalResources/Technotes/AdobeCampaign_Deliverability_...​