How do i get outlook2k3 inbox same as your webmails inbox?

I know this is similar to the other post, but it is diffrent than the autoarchive problem. (outlook can make you made).
Basically i want to get whats in my webmail acount to stay there and also be in outlook. outlook deletes the messeges and puts them on the computer. i dont know whats up with it. but i was wondering if any one could help me make outlooks emails the same as my webmails and for it to not take them out of the webmails inbox but "share it" if this is possible. thank you.

Have a look at these instructions:
http://ca.huji.ac.il/services/internet/mail/leave/outlookxp.shtml