1.Call the System Landscape Maintenance (transaction SMSY) in your Solution Manager system.
2. Create your SAP ECC System in the system landschape:
a. Select the landscape component Systems, and choose Create New System, in the context menu.
b. Enter the system ID as the system, in the following dialog box.
c. Choose the product SAP ECC, and the product version SAP ECC 5.0 or higher, from the possible entries help. Save.
d. Complete the system data, as far as possible.
e. Save your entries.
3. Generate the key:
a. Choose System Landscape ? Other Object….
b. Set the System flag, and choose the system awhich is to be installed or upgraded, from the possible entries help. If you have created a system in the SAP Solution Manager, in the previous step, choose it.
c. Choose Generate Installation/Upgrade Key.
d. Enter the required data and choose Generate Key.
The system displays the key.
Before you install ECC5, you have to install Solution manager first and generate key.