hi @andrewatfornax Thank you for your reply. I copied open sources for sure and run upgrade process using the same domain name, but I didn’t copy apache configs as our old openx used apache 2.2 and on new system we should use the latest apache .2.4 version but syntax on apache 2.4 was changed. Should I rewrite and copy apache configs? Also we have 3 domains under apache web root directory. one of them is for openx admin page, and I don’t know for which purposes the other two are used. I only know dns links with that domains should work and nobody in my team knows that.