Default encoding in the base http communicator does not match the default encoding coming from chris21.
chris21 can be changed to output UTF-8 (the default behaviour of the communicator), but this is not a robust long term solution.
UFCORE-56 will add the ability for the response encoding type to be changed, but the default will be UTF-8 (current behaviour). Identity Broker for Frontier chris21 should have it's use of the communicator information changed to default to UTF-7.
Example data (Célia outputs as C?lia):
Customer support service by UserEcho