SystemConfigurationUtil maintains a list if server IDs to server URLs and is used when Federation calls need to be made to the original server.
The URLs being stored assume that the deployment context is always lowercase so a lookup of a server ID always returns a lowercase version of the URL. If the deployment context is not all lower case, the request fails with a 404.
For example, a set of servers made up of:
These are stored in the list as http://openam1.example.com/sso and http://openam2.example.com/sso so a request meant for 2 that hits 1 is sent to http://openam2.example.com/sso which fails with a 404.