Follow the path: XMC>Material Management >Purchase Management>Setup>Buyer Maintenance
Click on New> New Buyer
Image Purchasing 35
...
Buyer, Person/Contact, Name, PO Limit, Approval Person and Email Address
Click Save
Image Purchasing 36
...
Click on New> New Authorized User
Image Purchasing 37
Click on Default Buyer
Click on Save
Image Purchasing 38
...
Click on New> New Authorized User
Image Purchasing 39
...
Click on the User with the drop down
Click Save
Image Purchasing 40