I don't believe there's a group policy for the master category list, but you could, in theory, add your own to the .adm file. (I haven't tried it, but it could be a useful experiment.) You can also set a default set of categories with a registry entry or script. See http://www.slipstick.com/outlook/olcat.htm

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Sue Mosher, Outlook MVP
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> I was told that I could set users' Outlook categories using the group policy
> template from the Office Resource Kit. I installed the outlk10.adm
> template, but can't find anything about categories. Is this wishful
> thinking, or am I looking in the wrong place?