Client Access

Applies to: Exchange Server 2010 SP3, Exchange Server 2010 SP2

In Microsoft Exchange Server 2010, the Client Access server role 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. You must install the Client Access server role in every Exchange organization and every Active Directory site that has the Mailbox server role installed.

The following topics are gateways to information about the Client Access servers in Exchange 2010.

• Understanding Client Access
  This topic provides feature information about the Client Access server role.

• Managing Client Access Servers
  This topic is a collection of links that provide information about managing Client Access features in your organization.

• Securing Client Access Servers
  This topic provides information about the security features of your Client Access server.

• Upgrade from Exchange 2003 Client Access
  This topic provides overview information about upgrading your organization's Client Access infrastructure from Exchange 2003 to Exchange 2010.

• Upgrade from Exchange 2007 Client Access
  This topic provides overview information about upgrading your organization's Client Access infrastructure from Exchange 2007 to Exchange 2010.

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