When sending an email from Outlook Web Access (OWA) in Windows Vista the text uses foreign (chinese) character sets.

1. Make sure your exchange server has the latest smime installed.

Then:

1.    Login to outlook web access
2.    Click options (bottom right).
3.    Under email security click download (or reinstall)
4.    Follow the instructions on screen.

You will need to do this on all computers running OWA in Internet Explorer. Other browsers are not affected.