It's a limitation of what conditions the Exchange server can evaluate. Why is a question only Microsoft could answer.
--
Sue Mosher, Outlook MVP
Author of Microsoft Outlook 2007 Programming:
Jumpstart for Power Users and Administrators
http://www.outlookcode.com/article.aspx?id=54
"F. H. Muffman" <(E-Mail Removed)> wrote in message news:(E-Mail Removed)...
> "Sue Mosher [MVP-Outlook]" <(E-Mail Removed)> wrote in message
> news:(E-Mail Removed)...
>>> I want to use this rule when I am out of the office and outlook is not
>>> running on my computer. Is there a way to do this so it processes on the
>>> "server" side instead of being "client-only"?
>>>
>>> I created the rule using "with specific words in the recipient's address"
>>> but when I go to save this, I recieve the message "this rule is
>>> client-only
>>> and will process only when Outlook is running".
>
>>
>> No, that functionality is available only in client-side rules.
>
> Just out of curiousity, why is 'specific words in the recipient's address' a
> client-side rule? I usually understand why one vs. the other, but that one
> I don't get....
>
> --
> f.h.
>