Hi Srikanth
is the issue with moving sales order date backward for 1 month or 1 day only due to which it is following in earlier month.? This is caused during the time zone conversion that occurs when R/3 sends schedule dates to APO and receives schedule dates back from APO. R/3 design does not pay attention to time, only dates. The R/3 interface recognizes that APO uses time, and sends time to APO.
Please check and align time zone maintain in the location master. I hope this will help you.
Thanks
Amol