AP invoices repository

[Shama321]

Hi all,

My client is using the attachments in the manage supplier invoices app in 2 SL and would like to know how to access that repository. 

I believe documents are stored in SAP DMS or via ArchiveLink but i do not have much information on these. I have been told to use SAP_COM_0109 communication arrangements or connect via BTP-based content services for integration or backend access, unfortunately again i do not have much knowledge on that as well.

Any guidance on how to access that repository and a step by step guide will be greatly appreciated. 

thanks!