What it does
Forwards the cloud user's identity to the internal system instead of a password of its own. Principal propagation is one of three authentication types it offers towards an internal system, beside basic authentication and technical user propagation.
Conditions
Trust has to be configured explicitly to the cloud entities whose user tokens are accepted as valid.; The calling application's destination configuration decides which of the three authentication types is used.
Remaining work
Install and register the connector, add the access control entry for the system, and set up the certificate and the subject pattern the internal system resolves a logon name from.