The current implementation of the console does not allow you to change these settings after it has been set up. Even if you delete the site from IIS you will still not be able to edit them.
There is not an error. You only have the options of changing the port that the CEM agents are using.
Changing this information could cause you to have issues with the certificates that are being used.
If you need to change these setting you can do the following:
ITMS 7.5 and later with the cloud enabled management web site created.