CoreIdmEngineConfiguration dependency

Any idea, CoreIdmEngineConfiguration class part of which Maven dependency ?

There is no such class as CoreIdmEngineConfiguration in the open source code base of Flowable 6.6.0.

If you are using the enterprise version of Flowable where that class does exist you are asking in the wrong forum. Questions about the enterprise products should be done in the Enterprise Forum or through your account managers and our Service Desk.