I need to update CRMD_ISUEXTA4 by an internal table in my code and as such just wanted to know if we have any standard API/FM for this as I am not able to find any.
Christian Drumm replied
If you are updating table EVERH in IS-U you have two options to also update CRMD_ISUEXTA4.
Either you simply perform a request load in CRM of the updated contracts after you have updated them in IS-U. Or you extend the program updating EVERH to also trigger a contract replication (e.g. by calling the function module
If you are performing a one time data correction I would recommend using the first approach.