Xandr audits creatives based on their own exchange standards. In order to start Xandr's creative audit, the line item your creatives are assigned to must be active and must target Xandr inventory.
Need to have a rejected creative re-reviewed?
Save the creative to restart the creative review process in Display & Video 360.
To contact Xandr, please visit https://help.xandr.com/and include your Xandr Creative ID.