Always prompt for user namd and password in outlook security

[Lillian Lian]

I would like to know how to write a script for my user on look mail setting,
which on Security--> User identification--> Always Promot for user name and
password, I want to always check, because I have some machine they are have
several mail box, if I don't do that, then they will see mail each other.

is anyone konw how to write the script for this to enable "Always prompt for
user name and password"

Thank you so much

Lillian