How change MANDT in control record of IDoc.

Hi,

I am generating IDoc file using program 'RSEOUT00', i want  to change the MANDT in control record before the file creation so that i can have the changed MANDT in output file.

Do we have any config or user Exit where i can change the control record of IDoc.

I tried using exits in below Enhancements but control doesn't stop there.

SIDOC001

SIDOC002

Please suggest.