You can download the latest SDK from the Microsoft website below.
Microsoft Downloads: CRM 4.0 SDK (4.04)
Size: 14.MB
Latest Additions and Updates
Offline Plug-in Security
New information about the additional security restriction for an offline plug-in, which requires that a registry key named after the public key token of the plug-in assembly be added to the system registry. The online/offline plug-in sample code and walkthrough was updated too.
Plug-in Constructor
Added a topic explaining how to write a constructor for a plug-in that accepts parameters. These strings can be used to pass information to the plug-in at run time.
Privileges by Message
The appendix showing the required privileges for each message has been updated. There are a few outstanding messages that will be completed in the next SDK release.
Outlook Sample Code and Programming Reference
The reference topics for the Microsoft.Crm.Outlook.Sdk assembly have been completed. Added new sample code that interacts with Microsoft Dynamics CRM for Microsoft Office Outlook using this assembly.
Using the Discovery Service in Microsoft Dynamics CRM Live
Added a topic to show how to get the Web reference for Microsoft Dynamics CRM Live.
SiteMap Sample Code
Added step-by-step instructions for how to change the label text in the navigation pane.
Scripting Sample Code
Added a new scripting sample that allows you to control which users can update data in a field.
Report Writers Guide
Added a new topics on linking reports, managing reports offline and new information about publishing reports.
Other Sample Code
- How to Send a Bulk E-mail and Monitor the System Job
- How to Start an Asynchronous Bulk Delete Job and Review Results
- Using the BackgroundSendEmail Message
- Using the QualifyMembersList Message
Overview
The Microsoft Dynamics CRM 4.0 Software Development Kit (SDK) is for developers, system customizers, and report writers.
It contains all new information about creating plug-ins, working with custom workflow activities, using the new Web services, using new data management features, and much more.
This SDK contains information for developers writing server side code, custom business logic, integration modules, workflow assemblies, and more. It provides an architectural overview of Microsoft Dynamics CRM, the entity model, security model, and Web services. Sample code and walkthroughs guide you through the new features.
The SDK also contains information for developers customizing the Web client or Microsoft Dynamics CRM for Microsoft Office Outlook, including scripting, integration of custom Web pages, sample code, and a detailed user interface style guide.
Look for regular updates to this SDK. Future releases will include the ISV Guide and Report Writers Guide.

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