SAP License cost is the biggest expense in SAP implementation and ownership. There is way in SAP to assign the correct license type to each user. Then there is a standard report which can use as a SAP License Audit to identify the right user license. The problem is how to know which user needs which type of license. When the company has multiple system and thousands of users the SAP Audit procedure for assigning the right user license type is going to be a tough job.