We've just implemented Exchange/Outlook 2010. I am having problems creating a new calendar and sharing it. I create a new calendar under Open Calendar -> Create New Blank Calendar. When I try to share it by clicking on Share Calendar, then entering an email address in "To" then sending it, I get this error message: Error while preparing to send sharing message. So I work around this by going to "Calendar Permissions" then adding the user and giving them "reviewer" permissions. However, when the user tries to open this calendar under Open Calendar -> Open Shared Calendar it cannot be found.
Appreciate any help I can get!!