Applies to: Exchange Server 2007 SP3, Exchange Server 2007 SP2, Exchange Server 2007 SP1, Exchange Server 2007
Topic Last Modified: 2007-06-27

Microsoft Office Outlook Web Access provides access to a user's mailbox from any browser that supports HTML 3.2 and European Computer Manufacturers Association (ECMA) formats. It is an ideal client for users who do not have access to Outlook, such as users who are traveling or who rely on shared workstations for access to e-mail and calendar information.

This topic covers basic questions that you might have about Outlook Web Access, and includes links to additional information.

Browser Requirements for Outlook Web Access

Outlook Web Access in Microsoft Exchange Server 2007 can be run in two formats: Outlook Web Access Premium and Outlook Web Access Light. Outlook Web Access Premium requires Internet Explorer 6 or later versions and has a rich feature set. Outlook Web Access Light works with most Web browsers, has fewer features than Outlook Web Access Premium, and performs better over slow connections.

Outlook Web Access Premium

The following table describes the combinations of browsers and operating systems that you can use together with Outlook Web Access Premium.

Versions of Web browsers and operating systems to use with Outlook Web Access Premium

Windows version Supported browsers for Outlook Web Access Premium

Windows Millennium Edition

Internet Explorer 6 and later versions

Windows 2000 Server

Internet Explorer 6 and later versions

Windows XP

Internet Explorer 6 and later versions

Windows Server 2003

Internet Explorer 6 and later versions

Windows Vista

Internet Explorer 7 in Windows Vista

Outlook Web Access Light

Outlook Web Access Light is supported on many browsers that support HTML 3.2 and ECMA. The following table describes the combination of browsers and operating systems that you can use together with Outlook Web Access Light.

Versions of Web browsers and operating systems to use with Outlook Web Access Light

Operating system Internet Explorer version Additional browsers

Windows 98

Internet Explorer 5.01, 5.5, 6, and later versions

Not available

Windows Millennium Edition

Internet Explorer 5.5, 6, and later versions

Not available

Windows 2000 Server

Internet Explorer 5.01, 5.5, 6, and later versions

Not available

Windows XP

Internet Explorer 6 and later versions

Mozilla Firefox 1.8, Opera 7.54

Windows Server 2003

Internet Explorer 6 and later versions

Mozilla Firefox 1.8, Opera 7.54

Windows Vista

Internet Explorer 7 in Windows Vista

Mozilla Firefox 1.8, Opera 7.54

Mac OS 9

Internet Explorer 5.01

Netscape Navigator 7.1

Mac OS 10.3

Not available

Safari 1.2

Sun Solaris 9, x86

Not available

Mozilla Firefox 1.8, Netscape Navigator 7.1

Linux Red Hat Desktop (RHEL3)

Not available

Mozilla Firefox 1.8, Netscape Navigator 7.1

HP/UX 11i

Not available

Mozilla Firefox 1.8, Netscape Navigator 7.1

Note:
Outlook Web Access is not supported on Microsoft Pocket Internet Explorer.

Effect of Virus Scanning on Outlook Web Access

There is an error message that users may receive in Microsoft Office Outlook Web Access for Exchange Server 2007 when an antivirus program changes a message in the Drafts folder.

Resolving the Error

If a message in the Drafts folder in Outlook Web Access is scanned by an antivirus program and triggers a screening rule that causes the message to be modified, the user will receive a warning message when they open the message and try to modify it or send it.

To resolve this issue, instruct the user to save and close the message, and then reopen it and try again.

For More Information

For more information about browsers that Outlook Web Access Light supports, see the following Web sites:

For more information about antivirus protection for Exchange 2007, see:

For more information about how to access public folders from Outlook Web Access, see How to Enable Users to Access Public Folders from Outlook Web Access.

For more information about Outlook Web Access client features, see Client Features in Outlook Web Access.