Forum Post: connection with the application object server could not be established ax 2012

I have (Disaster Recovery Site) and production site which contain Microsoft Dynamics AX 2012 and I installed another AOS and SQL server on DR to be a backup for production AOS. 1- DR Domain is child domain for production domain. 2- I try to create database replication between both sites. On the client computer I tried to change the connection on AX configuration utility to use the AOS on DR for testing the shifting operation for users between Production and DR. But I face this error when run AX: connection with the application object server could not be established ax 2012