How do I export my color category list to the Exchange server?

Hi -- when I initially synced my Outlook 2007 client with the Outlook
Exchange 2007 server, the server copied the color categories I was using in
the client, so that the category lists matched and if I assigned a category
to a message in Outlook, the message took on the same color in Exchange
(using web access).

Now, however, when I add new color categories or change the color assigned
to a category in the Outlook client, the server doesn't catch the change: new
color categories I've created in the Outlook client aren't assigned any color
in Exchange and don't appear in the Exchange list.

Is there a way to make the categories match or to manually export my
category list from the client to the Exchange server?

Thanks!
Alan