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Outlook Web Access

Exchange Server 2003
This topic provides information using Outlook Web Access to develop messaging applications.

Introduction

Microsoft® Outlook® Web Access provides a rich messaging environment for use with Exchange that can be accessed over the Internet. The components that make up the Outlook Web Access display can be reused in other applications, and new features can be added. In addition, you can create custom display and data entry forms by means of the Exchange Web forms registry.

Caveats

Support for customizing Outlook Web Access and reusing Outlook Web Access components is not available from Microsoft. Microsoft improves and adds features to Outlook Web Access with new releases of Exchange, and the Outlook Web Access internal workings and architecture may change without notice.

Functional Criteria

CriteriaOutlook Web Access
Application DomainModifications to Outlook Web Access are typically minor stylistic or graphical modifications to the display theme. Major modifications to Outlook Web Access are not recommended or supported. Some customers reverse-engineer the URLs that Outlook Web Access uses to display mailbox and public folder information, such as Inbox data, Calendar, and Contacts. They then use those URLs inside other Web-based applications, consoles, or portals. This use of Outlook Web Access is also not recommended.
Major ObjectsOutlook Web Access does not expose COM objects, or provide an object hierarchy. Instead, you can obtain the components of Outlook Web Access by using a URL; for example, https://mail.example.com/exchange/username/Inbox/?Cmd=contents
Data access modelOutlook Web Access returns data in various forms, including HTML and XML, depending on the capabilities of the client browser.
Threading ModelsNot Applicable.
Application ArchitecturesOutlook Web Access is a Web client application.
Remote UsageOutlook Web Access configured to use SSL/TLS and basic authentication can be used on an intranet as well as over the Internet.
TransactionsOutlook Web Access does not support transactions.
Management CapabilitiesOutlook Web Access as a development technology does not provide any management features to the application. The Exchange administration and the individual user can access Outlook Web Access and other Outlook Web Access configurations.
AvailabilityOutlook Web Access is a core component of Microsoft Exchange Server 2003. However, Outlook Web Access features and internal architecture may change without notice.

Development Criteria

CriteriaOutlook Web Access
Languages and ToolsOutlook Web Access components are only available by means of the HTTPS GET and POST methods.
Managed ImplementationOutlook Web Access is not an API and does not provide components for use in a managed or unmanaged development environment. However, you can use the HTTPRequest and HTTPResponse managed classes to access Outlook Web Access programmatically.
ScriptableIt is not possible to directly access Outlook Web Access components by using a script. It is possible to use an HTTPRequest or similar object to retrieve information from Outlook Web Access.
Test/Debug ToolsNo tools are available for debugging calls to Outlook Web Access, because the internal architecture is not available for debugging, and the URL calls required to access Outlook Web Access programmatically are not documented or supported.
Expert AvailabilityOutlook Web Access customization and component reuse is not supported by Microsoft.
Available InformationLittle or no information is available about customizing Outlook Web Access or reusing Outlook Web Access components and commands.
Developer / Deployment LicensingOutlook Web Access customization and component reuse is not supported by Microsoft.

Security Criteria

CriteriaOutlook Web Access
Design-Time PermissionsOutlook Web Access customization and component reuse is not supported by Microsoft.
Setup PermissionsOutlook Web Access customization and component reuse is not supported by Microsoft.
Run-Time PermissionsOutlook Web Access customization and component reuse is not supported by Microsoft.
Built-in Security FeaturesOutlook Web Access by default uses SSL/TLS and basic authentication.
Security Monitoring FeaturesNone.

Deployment Criteria

CriteriaOutlook Web Access
Server Platform RequirementsOutlook Web Access customization and component reuse is not supported by Microsoft.
Client Platform RequirementsOutlook Web Access customization and component reuse is not supported by Microsoft.
Deployment MethodsOutlook Web Access customization and component reuse is not supported by Microsoft.
Deployment Notes
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