Here you will get the option of maintaining master data of your customers and vendors. IRIS defined one master data uploadation input format. In that input format, you need to enter all required details.
And then upload this data on IRIS Sapphire. Here while upladation, some structural validation rules will get run on your data to check whether provided details are valid or not.
This facility is available on GSTIN level. So based on access rights, you can upload vendor master data on IRIS Sapphire
Usage of maintaining vendor master - In Reconciliation, on click of Send Mail button after selecting single/multiple records of a single counterparty, compose window will appear with auto-filled email addresses (which are present in Vendor Management for the pertinent counterparty).