[MS-SMB2]: Server Message Block (SMB) Protocol Versions 2 and 3 (original) (raw)


Share via


Specifies the Server Message Block (SMB) Protocol Versions 2 and 3, which support the sharing of file and print resources between machines and extend the concepts from the Server Message Block Protocol.

This page and associated content may be updated frequently. We recommend you subscribe to the RSS feed to receive update notifications.

Published Version

Date Protocol Revision Revision Class Downloads
7/28/2025 83.0 Major PDF | DOCX

Click here to download a zip file of all PDF files for Windows Protocols.

Previous Versions

Date Protocol Revision Revision Class Downloads
7/7/2025 82.0 Major PDF | DOCX
4/7/2025 81.0 Major PDF | DOCX
11/19/2024 80.0 Major PDF | DOCX
7/29/2024 79.0 Major PDF | DOCX Diff
7/8/2024 78.0 Major PDF | DOCX Diff
6/10/2024 77.0 Major PDF | DOCX Diff
5/24/2024 76.0 Major PDF | DOCX Diff
5/13/2024 75.0 Major PDF | DOCX Diff
4/23/2024 74.0 Major PDF | DOCX Diff
4/8/2024 73.0 Major PDF | DOCX Diff
3/25/2024 72.0 Major PDF | DOCX Diff
3/11/2024 71.0 Major PDF | DOCX Diff
2/26/2024 70.0 Major PDF | DOCX Diff
1/29/2024 69.0 Major PDF | DOCX Diff
9/20/2023 68.0 Major PDF | DOCX Diff
2/27/2023 67.0 Major PDF | DOCX Diff
4/29/2022 66.0 Major PDF | DOCX Errata Diff
10/6/2021 65.0 Major PDF | DOCX Errata Diff
6/25/2021 64.0 Major PDF | DOCX Errata Diff
6/2/2021 63.0 Major PDF | DOCX Diff
4/7/2021 62.0 Major PDF | DOCX Errata Diff
8/26/2020 61.0 Major PDF | DOCX Errata Diff
3/4/2020 60.0 Major PDF | DOCX Errata Diff
9/23/2019 59.0 Major PDF | DOCX Errata Diff
4/30/2019 58.0 Major PDF | DOCX Errata Diff
3/13/2019 57.0 Major PDF | DOCX Errata Diff
9/12/2018 56.0 Major PDF | DOCX Errata Diff
3/16/2018 55.0 Major PDF | DOCX Errata Diff
12/1/2017 54.0 Major PDF | DOCX Errata Diff
9/15/2017 53.0 Major PDF | DOCX Errata Diff
6/1/2017 52.0 Major PDF | DOCX Errata Diff
3/16/2017 51.0 Major PDF | DOCX Errata Diff
9/26/2016 50.0 Major PDF | DOCX Errata Diff
7/14/2016 49.0 Major PDF | DOCX Diff
10/16/2015 48.0 Major PDF | DOCX Errata
6/30/2015 47.0 Major PDF | DOCX Errata
5/15/2014 46.0 Major PDF | DOCX
2/13/2014 45.0 Major PDF | DOCX
11/14/2013 44.0 Major PDF | DOCX
8/8/2013 43.0 Major PDF | DOCX
1/31/2013 42.0 Major
10/25/2012 41.0 Major
7/12/2012 40.0 Major
3/30/2012 39.0 Major
12/16/2011 38.0 Major
9/23/2011 37.0 Major
6/17/2011 36.0 Major
5/6/2011 35.0 Major
3/25/2011 34.0 Major
2/11/2011 33.0 Major
1/7/2011 32.0 Major
11/19/2010 31.0 Major
10/8/2010 30.0 Major
8/27/2010 29.0 Major
7/16/2010 28.0 Major
6/4/2010 27.0 Major
4/23/2010 26.0 Major
3/12/2010 25.0 Major
1/29/2010 24.0 Major
12/18/2009 23.0 Major
11/6/2009 22.0 Major
9/25/2009 21.0 Major
8/14/2009 20.0 Major
7/2/2009 19.0 Major
5/22/2009 18.0 Major
4/10/2009 17.0 Major
2/27/2009 16.0 Major
1/16/2009 15.0 Major
12/5/2008 14.0 Major
10/24/2008 13.0 Major
8/29/2008 12.0 Major
7/25/2008 11.0 Major
6/20/2008 10.0 Major
5/16/2008 9.0 Major
3/14/2008 8.0 Major
1/25/2008 7.0.1 Editorial
11/30/2007 7.0 Major
10/23/2007 6.0 Major
9/28/2007 5.0 Major
8/10/2007 4.0 Major
7/20/2007 3.0 Major
7/3/2007 2.0 Major
6/1/2007 1.3.1 Editorial
5/11/2007 1.3 Minor
4/3/2007 1.2 Minor
3/2/2007 1.1 Minor
1/19/2007 1.0 Major
10/22/2006 0.01 New

Preview Versions

From time to time, Microsoft may publish a preview, or pre-release, version of an Open Specifications technical document for community review and feedback. To submit feedback for a preview version of a technical document, please follow any instructions specified for that document. If no instructions are indicated for the document, please provide feedback by using the Open Specification Forums.

The preview period for a technical document varies. Additionally, not every technical document will be published for preview.

A preview version of this document may be available on the Windows Protocols - Preview Documents page. After the preview period, the most current version of the document is available on this page.

Development Resources

Find resources for creating interoperable solutions for Microsoft software, services, hardware, and non-Microsoft products:

Plugfests and Events, Test Tools,Development Support, and Open Specifications Dev Center.

Intellectual Property Rights Notice for Open Specifications Documentation

Reservation of Rights. All other rights are reserved, and this notice does not grant any rights other than as specifically described above, whether by implication, estoppel, or otherwise.

Tools. The Open Specifications documentation does not require the use of Microsoft programming tools or programming environments in order for you to develop an implementation. If you have access to Microsoft programming tools and environments, you are free to take advantage of them. Certain Open Specifications documents are intended for use in conjunction with publicly available standards specifications and network programming art and, as such, assume that the reader either is familiar with the aforementioned material or has immediate access to it.

**Support.**For questions and support, please contact dochelp@microsoft.com.