In 1.0.3, changes were made to PreferencesServiceImpl as a result of integration of the fix on
KULRICE-4552. However, the original configuration parameter that was used for defaulting whether the outbox was turned on by default for a user was replaced by a new config parameter name. However, it was modified to allow for support of the old deprecated value still.
We should remove the usage of this deprecated value and ensure that it's documented appropriately in our Rice 1.1 release notes.