Hi,
Check if you can see the parameter in rz11.
68048 - Deactivating the automatic SAP* user
As of Release 4.0:
Only the login/no_automatic_user_sapstar parameter is supported for deactivating the SAP* user. If you enter the parameter in the default profile, it takes effect in all instances of the SAP System.
The old login/no_automatic_user_sap* profile parameter has no effect.
As of Release 7.0 (NetWeaver 7.0/2004s):
The default value of the login/no_automatic_user_sapstar profile parameter has been changed (previously 0, now 1). To activate the emergency user, you must set the login/no_automatic_user_sapstar profile parameter to the value 0.
You should see the above parameter as per your release.
then check at os level if you can see in any of the profile and if not then add in instance profile.
Do restart and then follow the below note to create new client.
550894 - CC-ADMIN: Setting up a new client
Thanks
Rishi Abrol