Wireless Data

Help!- I just bought a new LG VX9800 phone - it has internet connectivity via verizon wireless mobile web 2.0 . When I try and access my company's e-mail access portal for outside users via internet - (we are using Microsoft exchange 2003) - I get a message "security error untrusted server certificate" - given this phone does not have a true operating system, what can I do to get around this or fix it- our IT is generally cooperative but I'd like to offer them a solution.
thanks