Assigning Open Items via the Internet 
Use
If your business partner has encountered problems assigning your open items, he can use this function to request that you assign the items yourself.
Prerequisites
Your business partner has given you a user and password. You have also been given access to the Internet service Assignment of open items.
Procedure
If you want to reset an assignment, select it and then choose Reset.
Result
Your business partner receives your assignments per e-mail and can copy them into his R/3 System.