Administrator's Guide

Glossary
CAS Client Access Server. The Client Access server role is one of five distinct server roles for Microsoft
Exchange Server 2010. It supports the Outlook Web App and Microsoft Exchange ActiveSync
client applications, and the Post Office Protocol version 3 (POP3) and Internet Message Access
Protocol version 4rev1 (IMAP4) protocols. The Client Access server role also provides access to
free/busy data by using the Availability service and enables certain clients to download automatic
configuration settings from the Autodiscover service. For more information, see the Microsoft
Technet article, Understanding Client Access at
nl
http://technet.microsoft.com/en-us/library/bb124915.aspx.
DAG Database Availability Group. A database availability group is the base component of the high
availability and site resilience framework built into Microsoft Exchange Server 2010. A DAG is
a group of up to 16 Mailbox servers that hosts a set of databases and provides automatic
database-level recovery from failures that affect individual servers or databases. For more
information, see the Microsoft Technet article, Understanding Database Availability Groups at
nl
http://technet.microsoft.com/en-us/library/dd979799.aspx.
OWA Outlook Web Access. The Web browser-based version of Microsoft Outlook. Formerly called
"Exchange Web Connect" (EWC), Outlook Web Access (OWA) is provided by Exchange Server
and enables users on the road to access their email, contacts and calendar from any Web browser
without having to run a pre-configured Outlook client program.
UFM Voltaire's Unified Fabric Manager client software.
Witness Server A server used for high availability in conjunction with Database Availability Groups. For more
information, see the Microsoft Technet article, Create a Database Availability Group at
nl
http://technet.microsoft.com/en-us/library/dd351172.aspx.
WWN Worldwide name.
WWPN World wide port name. A unique 64-bit address used in a FC storage network to identify each
device in a FC network.
203