Thanks everyone for your valuable inputs. I have started looking into Samba as one of the options and have informed the same to the client.

After transformation, my project doesn't require the files to be written back to Unix. The transformed files have to be downloaded as CSV files and stored on Windows server.

Eirikur Eiriksson, could you please let me know what information is required when you quoted "network topology and connectivity"? I will try to gather these from my fellow-mates.

Thanks.