How to remove Network History

Dear all

we have Lotus Email Server when we try to access the Lotus File \\0.0.0.0 at the 1st time it ask for root or admin password but on 2nd time when we run \\0.0.0.0 it open the all file

my question is how i can remove the History so any time i try to access it have to prompt me for the password

Note: i did`t check Box to Remember the password

Thanks