Setting up a cross-device segment in the AMP is as easy as setting up a Mobile Advertising ID-only segment.
1. Model your segment. Please note that cross-device is possible for our Audience Targeting product only
2. Select your preferred Cross-Device Partner under 'Cross-Device'
3. Under 'Destination Partners' select Adform DMP Integration option with the required partner name - not the Pre-Bid integration
4. See the summary of the final CPM below. Please note that selecting cross-device targeting adds an extra cost to your final CPM.