https://docs.microsoft.com/en-us/openspecs/office_protocols/MS-SIPREGE/21acf797-984c-48ce-97e3-c7df5c776b3d Specifies the Session Initiation Protocol (SIP) Registration Extensions, which are the extensions to the Session Initiation Protocol (SIP) registration procedure. This protocol also defines the data format and the mechanism to retrieve in-band provisioning data, which are necessary for client sign in. https://docs.microsoft.com/en-us/openspecs/office_protocols/MS-SIPREGE/21acf797-984c-48ce-97e3-c7df5c776b3d <b>Protocol Revision:</b> 16.0<br/><b>Downloads:</b><br/><ul style="list-style-type: square;"><li><a href="https://msopenspecs.azureedge.net/files/MS-SIPREGE/[MS-SIPREGE].pdf">PDF</a></li><li><a href="https://msopenspecs.azureedge.net/files/MS-SIPREGE/[MS-SIPREGE]-240820.docx">DOCX</a></li></ul> Tue, 20 Aug 2024 MS-SIPREGE-20240820 https://docs.microsoft.com/en-us/openspecs/office_protocols/MS-SIPREGE/21acf797-984c-48ce-97e3-c7df5c776b3d <b>Protocol Revision:</b> 15.0<br/><b>Downloads:</b><br/><ul style="list-style-type: square;"><li><a href="https://msopenspecs.azureedge.net/files/MS-SIPREGE/[MS-SIPREGE]-210817.pdf">PDF</a></li><li><a href="https://msopenspecs.azureedge.net/files/MS-SIPREGE/[MS-SIPREGE]-210817.docx">DOCX</a></li></ul> Tue, 17 Aug 2021 MS-SIPREGE-20210817 https://docs.microsoft.com/en-us/openspecs/office_protocols/MS-SIPREGE/21acf797-984c-48ce-97e3-c7df5c776b3d <b>Protocol Revision:</b> 14.1<br/><b>Downloads:</b><br/><ul style="list-style-type: square;"><li><a href="https://msopenspecs.azureedge.net/files/MS-SIPREGE/[MS-SIPREGE]-190319.pdf">PDF</a></li><li><a href="https://msopenspecs.azureedge.net/files/MS-SIPREGE/[MS-SIPREGE]-190319.docx">DOCX</a></li></ul> Tue, 19 Mar 2019 MS-SIPREGE-20190319 https://docs.microsoft.com/en-us/openspecs/office_protocols/MS-SIPREGE/21acf797-984c-48ce-97e3-c7df5c776b3d <b>Protocol Revision:</b> 14.1<br/><b>Downloads:</b><br/><ul style="list-style-type: square;"><li><a href="https://msopenspecs.azureedge.net/files/MS-SIPREGE/[MS-SIPREGE]-181211.pdf">PDF</a></li><li><a href="https://msopenspecs.azureedge.net/files/MS-SIPREGE/[MS-SIPREGE]-181211.docx">DOCX</a></li></ul> Tue, 11 Dec 2018 MS-SIPREGE-20181211 https://docs.microsoft.com/en-us/openspecs/office_protocols/MS-SIPREGE/21acf797-984c-48ce-97e3-c7df5c776b3d <b>Protocol Revision:</b> 14.0<br/><b>Downloads:</b><br/><ul style="list-style-type: square;"><li><a href="https://msopenspecs.azureedge.net/files/MS-SIPREGE/[MS-SIPREGE]-180828.pdf">PDF</a></li><li><a href="https://msopenspecs.azureedge.net/files/MS-SIPREGE/[MS-SIPREGE]-180828.docx">DOCX</a></li></ul> Tue, 28 Aug 2018 MS-SIPREGE-20180828 https://docs.microsoft.com/en-us/openspecs/office_protocols/MS-SIPREGE/21acf797-984c-48ce-97e3-c7df5c776b3d <b>Protocol Revision:</b> 13.0<br/><b>Downloads:</b><br/><ul style="list-style-type: square;"><li><a href="https://msopenspecs.azureedge.net/files/MS-SIPREGE/[MS-SIPREGE]-180724.pdf">PDF</a></li><li><a href="https://msopenspecs.azureedge.net/files/MS-SIPREGE/[MS-SIPREGE]-180724.docx">DOCX</a></li></ul> Tue, 24 Jul 2018 MS-SIPREGE-20180724 https://docs.microsoft.com/en-us/openspecs/office_protocols/MS-SIPREGE/21acf797-984c-48ce-97e3-c7df5c776b3d <b>Protocol Revision:</b> 12.0<br/><b>Downloads:</b><br/><ul style="list-style-type: square;"><li><a href="https://msopenspecs.azureedge.net/files/MS-SIPREGE/[MS-SIPREGE]-180427.pdf">PDF</a></li><li><a href="https://msopenspecs.azureedge.net/files/MS-SIPREGE/[MS-SIPREGE]-180427.docx">DOCX</a></li></ul> Fri, 27 Apr 2018 MS-SIPREGE-20180427 https://docs.microsoft.com/en-us/openspecs/office_protocols/MS-SIPREGE/21acf797-984c-48ce-97e3-c7df5c776b3d <b>Protocol Revision:</b> 11.1<br/><b>Downloads:</b><br/><ul style="list-style-type: square;"><li><a href="https://msopenspecs.azureedge.net/files/MS-SIPREGE/[MS-SIPREGE]-171212.pdf">PDF</a></li><li><a href="https://msopenspecs.azureedge.net/files/MS-SIPREGE/[MS-SIPREGE]-171212.docx">DOCX</a></li></ul> Tue, 12 Dec 2017 MS-SIPREGE-20171212 https://docs.microsoft.com/en-us/openspecs/office_protocols/MS-SIPREGE/21acf797-984c-48ce-97e3-c7df5c776b3d <b>Protocol Revision:</b> 11.1<br/><b>Downloads:</b><br/><ul style="list-style-type: square;"><li><a href="https://msopenspecs.azureedge.net/files/MS-SIPREGE/[MS-SIPREGE]-170919.pdf">PDF</a></li><li><a href="https://msopenspecs.azureedge.net/files/MS-SIPREGE/[MS-SIPREGE]-170919.docx">DOCX</a></li></ul> Tue, 19 Sep 2017 MS-SIPREGE-20170919 https://docs.microsoft.com/en-us/openspecs/office_protocols/MS-SIPREGE/21acf797-984c-48ce-97e3-c7df5c776b3d <b>Protocol Revision:</b> 11.0<br/><b>Downloads:</b><br/><ul style="list-style-type: square;"><li><a href="https://msopenspecs.azureedge.net/files/MS-SIPREGE/[MS-SIPREGE]-170627.pdf">PDF</a></li><li><a href="https://msopenspecs.azureedge.net/files/MS-SIPREGE/[MS-SIPREGE]-170627.docx">DOCX</a></li></ul> Tue, 27 Jun 2017 MS-SIPREGE-20170627 https://docs.microsoft.com/en-us/openspecs/office_protocols/MS-SIPREGE/21acf797-984c-48ce-97e3-c7df5c776b3d <b>Protocol Revision:</b> 10.0<br/><b>Downloads:</b><br/><ul style="list-style-type: square;"><li><a href="https://msopenspecs.azureedge.net/files/MS-SIPREGE/[MS-SIPREGE]-160914.pdf">PDF</a></li><li><a href="https://msopenspecs.azureedge.net/files/MS-SIPREGE/[MS-SIPREGE]-160914.docx">DOCX</a></li></ul> Wed, 14 Sep 2016 MS-SIPREGE-20160914 https://docs.microsoft.com/en-us/openspecs/office_protocols/MS-SIPREGE/21acf797-984c-48ce-97e3-c7df5c776b3d <b>Protocol Revision:</b> 10.0<br/><b>Downloads:</b><br/><ul style="list-style-type: square;"><li><a href="https://msopenspecs.azureedge.net/files/MS-SIPREGE/[MS-SIPREGE]-160715.pdf">PDF</a></li><li><a href="https://msopenspecs.azureedge.net/files/MS-SIPREGE/[MS-SIPREGE]-160715.docx">DOCX</a></li></ul> Fri, 15 Jul 2016 MS-SIPREGE-20160715