Transaction Code SLICENSE
This is used to maintain license certificates for the system
received from SAP. The license is issued by SAP for the combination key SAPSID,
Hardware key that is to be provided over the http://service.sap.com/slicense
On receipt of the license file from SAP, save it on to your
PC and execute this transaction and select New Licenses and select Install
license, this lead to a new window where you can browse and chose the file sent
by SAP and Open. Again this is a onetime operation after the SAP system
installation.