Sharing a calendar in Outlook Web App 2010
Note: The outlook web parts URL that worked in Exchange 2008 will not work for Exchange 2010. Please use the link below for a step by step to configure Calendar sharing in Outlook Web App 2010
Read only access to a Shared Exchange Mailbox can be granted to individuals using the Microsoft Outlook client. Instructions for Outlook 2010 and Outlook 2007 are included below. Reference: http://its.vanderbilt.edu/Vmail/SEM/read-only