Windows Protocols

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This documentation contains detailed technical specifications for Microsoft protocols that are implemented and used by Windows to interoperate or communicate with other Microsoft products. It also contains technical specifications for extensions to industry-standard and other published protocols that are used by Windows. In addition, the documentation includes a set of companion technology overview and reference documents that supplement the technical specifications with conceptual background, overviews of inter-protocol relationships and interactions, and technical reference information.

Although the Open Specifications technical documents are freely available, many of them include patented inventions. Some of these patents are available at no charge under the Open Specifications Promise or the Microsoft Community Promise. The remaining patents are available through various licensing programs. For more information, please visit the Microsoft Open Specifications Dev Center or send an email message to the IP Licensing Team

Explore Windows Protocols Documentation

What's New and Changed in Windows Documents

Provides information about and links to new and updated protocol documents that contain details about the most recently released versions of Windows Client and Windows Server operating systems.

Windows Protocols Preview Documents

Provides preliminary versions of new or updated Open Specifications technical documents for community review and feedback.

Windows Protocols Errata

Provides clarifications and adjustments of content issues in published versions of protocol documents that could impact an implementation.

Windows Protocols Overview Documents

Provides information about the protocols and other technologies that are included in the Windows Protocols documentation set and the relationships among those technologies.

Windows Protocols Technical Documents

Provides detailed technical specifications for Microsoft proprietary protocols (including extensions to industry-standard or other published protocols) and other technologies that are used by Windows to communicate with other Microsoft products.

Windows Protocols Reference Documents

Provides reference documents that are available for use with the Windows Protocols documentation set.

Q&A and Blogs

Windows Open Specifications and Standards Support - Microsoft Q&A

Home to technical questions and answers about Windows Open Specifications and Standards Support documents.

Open Specifications Blogs

These blogs, authored by the engineers who support the Open Specifications documents, provide a different venue for further discussion of those documents.

Windows Interoperability Developer Blog

This blog is updated with the latest information on releases of the Open Specifications documents.



Windows Protocols PDF .zip file
(600+ MB)

Standards Support Downloads

Open Specifications Developer Center

FAQ: Network Captures for Technology Overview Documents

Windows Protocols Archived Forums