@GayanD ,

As in IFS where each company has a company ID, on the supplier´s system side the supplier might have It own company ID. This supplier ID is thir own system should be indicated as Supplier´s Own ID.

IF your are using any EDI communication should be completed,

as an example when cofiguring Pagero for Sending Purchase Orders – Set-up. It is indicated to complete:

• On the general tab you should add our ID to the supplier’s system.
•  You must also add the supplier’s own address ID for each address and check for address type

It is mainly important when comunicating to your supplier system directly or by xml files.

Hope it help.