Shared calendar categories

[FriendlyKC]

I have a business client using Exchange Server 2003 and Outlook 2007. One user has created a shared calendar with color categories. Most users viewing this calendar can see the color categories fine, but two users see all appointments as the same colors, though the category labels are there. All users are using 2007, and all users' mailboxes have color categories enabled.

I have found several similar posts on the web, but the predominate answer is that colors are not shared and must be created on each computer. This seems to fly in the face of the fact that the users that can see the colors did not have to manually add them to their MCL, they just showed up when they opened the shared calendar.

Any help is greatly appreciated.

Thanks,
Geoff