Ravi,
SAP* user can be deleted if there is no user is able to login but in this case its a IDES system, so you still able to login to IDES 800 client using DDIC username with 19920706 as password and SAP* 06071992.
since SAP* locked try to login using DDIC username in 800 client with pwd mentioned and above password is valid in IDES alone.
Try Abisishek Gupta steps if all users locked out.Abhishek Gupta
Regards,
RK