Hi Senthil,
I guess I didnt get the issue here. I mean you maintain forecast horizon to plan only based on confirmed customer orders or any dependent demand in the short term. So, you dont consider forecast as a part of your total demand by maintaining a forecast horizon.
Eventually SNP heuristic/Optimizer will not plan any supply (distribution receipt) for the forecast demand inside this horizon. So, deployment will not create any supply confirmation for this forecast as well.
Now if you dont want this to happen, then simply remove the forecast horizon from the loc-product master! Am I missing something?
Anyway some thought here-
you can define a new custom macro to calculate the total demand as per your requirement. Or you can use a custom macro to calculate your total ATD receipt or ATD issue quantity as per your client's needs (considering/not considering the forecast horizon).
Finally take your deployment run.
Thanks,
Satyajit