Software

I have Exchange 2K running on a Windows 2K server. The server is also the Active Directory enabled Domain Controller. I have a Public Folder Calendar that I want to "publish" via OWA so people going to my website can link to and view the calendar without having a logon and so I don't have to create usernames for them! I think I have all the permissions set in the Exchange Public Folder area, but when I access it via OWA I'll get a logon prompt. If I logon, it's fine. The other odd thing isthat if I reboot the server, I can access the calendar for a few moments with out a logon (once the server comes back up of course).
Anyone have some ideas as to what to look at to make anonymous access possible?

Thanks!