STEP 1
Enter the transaction OAOR or Option "Find" from the SAP menu
Press Enter 
STEP 2
Fill Class Name and Class Type always with the values shown below:
- Class Name: BUS2072
- Class Type: B0
And press
STEP 3
Fill the concerned Controlling Area and Document number
Press Enter
STEP 4
Select the folder : Cost Accounting Document
And after choose folder: Document types for obj
STEP 5
Choose the document type according to the extension of the file you want to attach
STEP 6
Double-click on 3S-xls documents if you want to attach xls document
and select the file that you want to attach to the posting with a double click
STEP 7
Additional attributes of the attachment :
You can fill Description and up to 5 keywords
After that, the document is stored (archived).
