This is a known issue, resolved by upgrading to Outlook 2007 or by using a mailbox for each resource calendar rather than a public folder.

Signature
Sue Mosher, Outlook MVP
Author of Configuring Microsoft Outlook 2003
http://www.turtleflock.com/olconfig/index.htm
and Microsoft Outlook Programming - Jumpstart for
Administrators, Power Users, and Developers
http://www.outlookcode.com/jumpstart.aspx
> Hi All,
>
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>
> Alkesh Chandegra
Phixit - 10 May 2007 15:55 GMT
Hi Sue, Although i'm sure that Outlook 2007 resolves a number of issues it
is not a viable option for us to upgrade at this point in time on a corporate
scale. Is there not a patch available for this as it is a known issue?
Going back to mailboxes means that my users will not be able to view the
meeting rooms nicely grouped as public folders and will mean more of a
management overhead, so if I can avoid this then that would be good.
> This is a known issue, resolved by upgrading to Outlook 2007 or by using a mailbox for each resource calendar rather than a public folder.
>
[quoted text clipped - 15 lines]
> >
> > Alkesh Chandegra
Sue Mosher [MVP-Outlook] - 10 May 2007 16:13 GMT
The resolutions I suggested are the only ones I know of. Given that public folders are not intended for use as resource calendars, I would not expect a fix to solve this problem.
Users can use the Group Schedule feature to view meeting rooms grouped together.

Signature
Sue Mosher, Outlook MVP
Author of Configuring Microsoft Outlook 2003
http://www.turtleflock.com/olconfig/index.htm
and Microsoft Outlook Programming - Jumpstart for
Administrators, Power Users, and Developers
http://www.outlookcode.com/jumpstart.aspx
> Hi Sue, Although i'm sure that Outlook 2007 resolves a number of issues it
> is not a viable option for us to upgrade at this point in time on a corporate
[quoted text clipped - 23 lines]
>> >
>> > Alkesh Chandegra