We all are aware of how important this transaction is. This blog post is a repost of a Linkedin Blog based on a document created by Chaitanya Bhangale.

Purpose of Automatic account determination :

• When good movement is entered, if the G/L account is to be posted 
  manually it is quite impossible to recollect and feed the correct G/L account
  every time during the transaction.
• By automatic determination SAP system recollect all the data to determine
  the correct GL account during the transaction.

Thanks Once again to Chaitanya for sharing this on the internet.

There are many other blog posts written on the same subject.

– Automatic account determination

–Automatic account determination

Please share your thoughts or any other links on blogs.sap.com to consolidate.