How would you add third-party verification to a creative when Campaign Manager is your ad server?
In Display & Video 360, use the custom tag wrapper feature
Add the Display & Video 360 tags to Campaign Manager with the third party verification’s tracking link
Download the Campaign Manager tag, append to the Display & Video 360 tag, and perform a SDF bulk upload
Add the integration code to the advertiser’s Basic Details and upload the tags to Display & Video 360