Hii Naga,
APO has some specific applications, that don't exist in ECC. So you can't maintain in ECC. For example:
SNP application tabs , you have to maintain in APO only.
PPDS Application Tabs: Some of fields you have to maintain in APO, some of fields can be CIF from ECC..
So you have to specific Which Fields you want to Update from ECC. Because some of fields you can also control through user exit as well...
Regards
Debashis