Hi Brahmankar,
Transaction CO11N, enter the order number and the operation number quanity , youneed press Enter.
after you change the quantity then proposed activities are recalculated .
--> No, after changing qty, proposed activities remain the same (that's my problem)
Is it working with Standard confirmation profile?
--> Yes!
Also check customer exit for confirmation like CONFPP06, CONFPP07 is activated in your system
--> I activated theses exits, but nothing has changed.