The home page is not required for CAD to work, but if you want to get rid of the message-
Desktop Administrator is an application you download from the UCCX web admin page, I believe under Tools, Plugins. Once installed, the setting is in CAD Agent, User Interface, Browser Setup. There's a default workflow group that might work for you or if you need a different configuration for different teams, you can create your own workflow groups. I believe you can disable the integrated browser if your team(s) don't need it.
Google- cisco desktop administrator user guide uccx 8.6