Set application specific values to .properties file of an external jar
We are using some external jars and they have .properties config files where they are setting some environment variables like application id, the security domain can be used by those jars for outbound rest calls, and others. In that properties file they have placeholder value for security domain to be used by application (in our case Pega). So they are expecting a .properties file which overrides the value defined in external jar and it is working the same way in other applications which are not Pega but developed in Java.
My question is how do we override such environment properties like security domain from Pega with our application specific values.