Idocs reciever port determination

Reciever port for outbound idocs can be determined from
1) Distribution model (in SALE tcode) - where  message type is assigned to reciever's Logical system (LS) which is assigned to sender's LS
2) From Partner profiles (WE20), where recieving port determined from Partner (KU, LS, etc).
 

Transfer Consignment stock from one plant to another plant

Transfer Consignment stock from one plant to another plant is not possible with single movement in SAP.
Refer to note 13006.  Alternate way explained in note

How to debug CRM WebUI using Conditional Breakpoints

See SAP KBA

1849381 - How to debug CRM WebUI using Conditional Breakpoints

BAPI s in SAP

BAPI_OUTB_DELIVERY_CHANGE - To change Delivery document.  If you do not find field in Bapi, then try EXPORT/IMPORT  - Import in MV50AFZ1 - userexit_save_document_prepare

BAPI_TRANSACTION_COMMIT - Use this after main Bapi to commit.