Found guide for how to set private link up between ADF and Altas MongoDB right at the support page. It did not appear in my abbundance of google searches! https://support.mongodb.com/article/000021617

This is one of the important features that we are looking for. We hope this feature will be released as soon as possible.

After multiple attemps, I got it to work. It is just not documented. You have to: 1 - Create the private endpoint in Atlas (vnet name should be "default" or use az cli to find out) 2 - Note the connection string to connect to the private endpoint in mongodb:// format (ex: mongodb://USERNAME:PASSWORD@PRIVATE-ENDPOINT-HOSTNAME:1033,PRIVATE-ENDPOINT-HOSTNAME:1034,PRIVATE-ENDPOINT-HOSTNAME:1035/?ssl=true&replicaSet=REPLICATSET-NAME&authSource=admin&retryWrites=true&w=majority) 2- Create a managed private endpoint of type "Private Link Service" in ADF and add the PRIVATE-ENDPOINT-HOSTNAME in the Fully Qualified Domain Names list 3- Create the MongoDB Atlas Linked service using a private integration runtime and the aforementioned connection string. Hope this helps!

Please enable this feature

It's really an important feature for network security. Hope this feature can be released ASAP.