Hi,
1- If I remove the Qdabra AD data connection and remove the values from my fields where there is a connection to AD Web Service and republish, I can open the form with the browser. It works.
2- If I leave the Qdabra connection, remove the browser compatibility, republish, I can open the form with Infopath, it works.
Under Central Administration, Application Management, Infopath Forms Services and Configure InfoPath Forms Services, the checkbox has been selected for "Allow cross-domain data access for user form templates that use connection settings in a data connection file".
Thank you