The *SYSTEM Store is a place where SSL Certificates and Certificate Autorities (CAs) are stored for use by the system.
When you create the *SYSTEM store by default a few of the more common CAs are automatically added to the store.
To create the *SYSTEM store follow the following instructions:
Work with the Digital Certificate Manager.
From the selection on the top under "Actions", selecte Create Certificate Store.
If your *SYSTEM store isn't yet created you'll have the option to create it here. Just enter a password when prompted and and you have completed this step.
If it does ask if you want to create a certificate, select NO.
Just to make sure the authorities to the keyring files are set you should issue the following commands:
CHGAUT OBJ('/QIBM/UserData/ICSS/Cert/Server') USER(*PUBLIC) DTAAUT(*RX)
CHGAUT OBJ('/QIBM/UserData/ICSS/Cert/Server/*') USER(*PUBLIC) DTAAUT(*R)