Hi Sebastian,
I have mentioned the business object from ECC system, in SRM it might differe. If BUS2207 is the business object, you can use the same.
Archiving object is different from Business Object. Archiving object is to archive the relative data from different tables(It is for archiving the transactional data). Your requirement is for archiving the ERS document, so you can leave this.
As specified earlier please do the configuration, from OAC2,OAC0,OAC3,NACE and OAM1 for archiving setup. After that by running the report RMMR1MRS(it is in ECC, not sure about the report in SRM system) you can choose the documents for which it need to generate the ERS documents. With the help of configuration the document will generate the tRFC entry to store the PDF document to external content server which is mentioned in OAC0.
What ever information you want to see in PDF it is defined in the report of SAP Form. You can get the report name from NACE.
Regards,
Sudheer T