This means that you can have rules for when you are on vacation or out of the office. If you want to migrate your personal address book you will have to print it and manually re-enter the entries into Outlook. With a global directory the need for personal addresses are greatly reduced. Outlook is the desktop client for the Exchange server. Outlook is your window into your Exchange mailbox on the server.
Exchange is the software that runs on the server where the messages are stored.
It handles the message database, incoming and outgoing mail, etc. There are two ways to change your exchange password using the Outlook client. Yes, the global Exchange directory will contain everyone in the UM system that has an official email address. The Outlook client will enable you to look up the email address for someone either during message creation or directly from the Address Book. Mail draft messages end up in your Outlook inbox as special messages.