Hi Jatin
Since you are using MessageTransformBean for FCC, then VS is not an option for you.
You will need to use Dynamic Configuration and ASMA then. Construct the file name with a UDF in message mapping and save that into Dynamic Configuration, then set ASMA in the receiver channel. Since you are using SFTP adapter, make sure the namespace used in the UDF matches the namespace in the receiver channel. Refer to sample wiki of DC and ASMA below - note that that is using File adapter which has a different namespace
Rgds
Eng Swee