When it comes to Exchange 2010, connectivity is really where it’s all at. With the now sole exception of public folder access, all client traffic goes via the Client Access Server role.

This is a significant change over previous versions, and even an improvement over Exchange 2007. What’s more, all roles (with the exception of the Edge Transport) can happily co-exist on a single hardware platform.

The Client Access Server is responsible for controlling:

Native MAPI using traditional Exchange-RPC

Outlook Web App . The OWA graphical user interface has been rewritten to make the same functionality and feature set available in non Microsoft browsers.

Microsoft Active-Sync. Stay up to date using Always Up To Date (AUTD) notification or Service Pack 2 Direct Push technology for e-mail to your smart phone on the move.

Outlook Anywhere. The Windows Server RPC over HTTPS proxy service can be leveraged by Outlook to allow full native MAPI mailbox access over the Internet without any requirement to provide a remote access or VPN solution to your staff.

POP3, IMAP4, NNTP. All available if required but disabled by default in keeping with the SD3 framework.

It’s also possible to control access to your Microsoft Exchange Server infrastructure at a very granular level.

RPC Static Port Mapping . With Outlook and Exchange Server it is possible to statically define the TCP ports RPC allocates for Directory and Information Store access. In a highly secure configuration it is only necessary to allow three static TCP ports access to the Exchange server infrastructure, a dramatically reduction over native RPC.

Client Selectivity. Access to Microsoft Exchange Server can be restricted on a user or client version specific basis . You can allow access only to standard or supported versions of Outlook within your organisation.

The Client Access Server is the key role in getting your users connected to their mailboxes.

A proper understanding of how to design and scale the Client Access Server role may need to accommodate topics such as:-

Load balancing
Multiple Active Directory sites
Multiple data centers
High availability configurations
Internet access options including proxy and redirection

and how these various options interact with each other.

Click here to contact us about any Exchange Client Access issues you may have.