You have an Exchange Server 2010 organization.A user reports that some meetings are missing from her calendar.You need to recover the missing calendar items.The solution must ensure that the missing calendar items are recovered automatically.
What should you do？（）

A.Create a new sharing policy
B.Create a mailbox
C.Modify the properties of the Calendar managed default folder
D.Modify the schedule for the Managed Folder Assistant

A.From Microsoft Office Outlook， modify the properties of the resource mailbox.
B.From the Exchange Management Console， create a new sharing policy.
C.From the Exchange Management Shell， set the Resource Delegates parameter for the resource mailbox.
D.From the Active Directory Users and Computers console， reset the password for the account associated to the resource mailbox， and then provide the password to the user.

A.a managed folder mailbox policy
B.a new distribution group
C.a new management role
D.a new role assignment policy