The Get-CASMailbox cmdlet returns a complete list of the attributes of a mailbox on an Exchange 2007 Client Access server. A variety of CASMailbox attributes are returned. The types of attributes that are returned include Outlook Web Access, ActiveSync, POP3, and IMAP4.
By default, all attributes are returned for all mailboxes in the Exchange organization. You can filter these results by using the functionality in the Exchange Management Shell.
The Get-CASMailbox cmdlet can run only on an Exchange 2007 computer that has the Mailbox server role installed. To run the Get-CASMailbox cmdlet, the account you use must be delegated the Exchange View-Only Administrator role.
For more information about permissions, delegating roles, and the rights that are required to administer Exchange 2007, see Permission Considerations.