Users cannot see the archive calendar when using Outlook Web Access but it's available in the full Outlook Client

We are using Exchange 2010 SP2 Ent. UR4 v2.  I'm not finding the options for setting up access to the users archive calendar with OWA.  Is this option available using OWA?  How do I configure it.  I have not found any helpful info. so far on the internet.  Hope this is the right forum...any help will be greatly appreciated. 

Thanks,