Solution : https://service.sap.com/sap/support/notes/214220 (SAP Service marketplace login required)
Key words : 
technical infrastructure -> method execution -> activate background dispatching, basis -> basis services/communications interface --> bc sapconnect, /3 adapter -> initial download -> monitoring -> monitor download objects, products -> deactivate/reactivate crm-specific data, workbook 0bbp_conf_q002 title goods/service confirmation documents, /3 adapter -> initial download -> object management -> business objects, -taxable   xi1         tax-relevant           x---------------------------------------------------------, characteristic bidder registration deadline               technical, system proposes tax code i1, title bid invitations - single records
Related Notes : 
       
| 322123 | Plug-in for R/3 3.1I w/o modification - BBP 2.0B | 
| 303515 | SAP Bus.-to-Bus. 2.0B Installation: Composite Note | 
| 302982 | CRM Middleware 2.0B: Installation and upgrade | 
| 209750 | Additions upgrade to BBP 2.0B / CRM 2.0B |