Exchange 2003

I have been told to set up multiple user profiles on one of our managers.
We do not want to give her the passwords, so when I set up the profiles,
I told each one to "remember" the password.

The problem is that each time you switch to a different profile you have to
re-enter the credentials.

Is there a way to set up these multiple profiles without her having to enter
the password? We use Exchange 2003 with SP2 and the is using Win XP with Outlook 2003. It will still ask for the password when you go into the same user profile as the window user login and password. Any help would be appreciated.