Intergation FI and MM/ Offsetting entry for inventory posting

Question

Dear all,
I am configuring Intergation FI and MM.
Transaction GBB, I can't link to Valuation grouping code and Transaction Key
Where did I miss in configuration process?
Please tell me how to configure step by step
Thank for your help
Minhtb

Answer 1

FI-MM: The integration between FI-MM happens in T-code OBYC. 
  1. When PO is created :
No Entry -
  2. When GR is posted 
      Inventory Account dr (Transaction Key BSX in OBYC)
            To GRIR account (T.Key WRX in T-code OBYC)
  3. When Invoice is posted
      GRIR account Dr.
      Vendor account  Cr.
  4. Payment made to Vendor
      Vendor A/c Dr
            To Bank Clearing A/c Cr.
Points to know : Movement Types, Assignment of Movement types to T-keys (T-code OMJJ), Value string (I also need some information on this) , OMWN and OMWB transactions. 
There is a close integration b/w FI & MM, actually document flows from MM to FI in the following areas such as,
1. Movement Types:
Used to enable the system to find the predefined posting rules determining how the accounts of financial accounting system are to be posted & to update the stock fields in the matrl master data.(Goods Receipt, Goods Issue, etc)
2. Valuation Class:
Assignment of material to grp of gl account, used to determine the gl accounts that are updated as a result of goods movement.
3. Transaction/Event key:
Used to control the storage or filing of documents & assignment of documents.Used to differeniate b/w various transactions such as goods movement tht occur in inventory.
4. Material Type:
Each material should assign mtrl type in mtrl master record used to update whether changes made in qty are updated in material master record & change in value also updated in stock account.
Regards,
Rajesh Banka