Hi,
According to me in SAP from legacy asset you just pass the told accumulated amount of depreciation. So if asset is of 100 Rs and 60 Rs depreciation is posted and NBV is 40 Rs. So in SAP the bifurcation of 60 Rs wont be available. The amount of 60 rs is from the calculation that is done in the Legacy System. So what you can do is that you can show to auditor the legacy system and you can compare the sum of depreciation of legacy system with the sum of depreciation passed in SAP and then auditor should be satisfied that data is correct.
Regards,
Malhar.