How to Migrate SAP / Oracle Systems to new domain?

Hello,

what do I need to do to migrate SAP Netweaver 7.4 (ABAP and JAVA, Oracle 12g) systems to a new active directory domain?

Note 1233320 is talking about using the system rename function from SWPM, but that's not working - its messing up the Oracle configuration* if I use the same source/target SIDs (even on a clean new testsystem).

Do I need to use a full system copy?

*( from ora_sql_results.log: ORA-12560: TNS:protocol adapter error)