Scan documents into SAP

Hi experts.

Let me present the following question.

At the client there are a group of documents that arrive in paper format which must be afterwards scanned into to the legacy application.

It is intended to replace the legacy application with SAP DMS.

I haven't found any relevant documentation detailing how can a document be digitalized and sent into DMS or SAP CRM (preferibly DMS), if it is even possible at all.

Does anyone knows of a solution for this?

And how to initiate a workflow upon digitalization?

Thanks in advance.

Regards.

JF.