You need to ensure that each item that passes the retention period is removed daily between 2:00 and 6:00.
You need to ensure that users can send and receive email by using Windows Live Mail or Microsoft Outlook Express.
You need to ensure that all users on Server3 can successfully access their mailboxes by using Exchange ActiveSync.
You need to ensure that all users can send and receive email messages after their mailboxes are moved to Server3.
You need to install the Exchange Server 2010 pre-requisites for the Unified Messaging (UM), Mailbox, Client Access, and Hub Transport server roles