I have a server with hostname aaa.yyy.com and alias bbb.yyy.com. I have installed Portal 10.5.1 and Web Adaptor 10.5.1 on the server. I have set the WebContextURL and Web Adaptor to bbb.yyy.com. Then I have created some maps and apps on the Portal. Now, the problem is the apps can only be accessed from bbb.yyy.com. If the apps are accessed from aaa.yyy.com, the browser only turns blank. Anyone have ideas?