You will be automatically enrolled in Medicare Parts A and B effective the month you turn 65. If you do not receive Social Security benefits, then you will need to sign up for Medicare by calling the Social Security Administration at 800-772-1213 or online at http://www.socialsecurity.gov/medicareonly/ .
The Client Access Server (CAS) is installed by default. Plan to have a Client Access server in each site that has an Exchange 2010 mailbox server. Your main clients will probably be desktop machines running Microsoft Outlook. Other client types include POP3, IMAP4, Exchange ActiveSync, Web, and Outlook Anywhere.
Exchange transaction log. In Microsoft Exchange, a transaction log is a file that contains a record of the changes that were made to an Exchange database. Information that needs to be added to a mailbox database is first written to an Exchange transaction log and then the contents of that transaction log are later written to the Exchange Server database. Microsoft chose to use the transaction log model so users can still access Exchange Server during a backup.