https://docs.microsoft.com/en-us/openspecs/office_protocols/MS-SIPAE/ba3e9821-fa85-4e0f-a80c-5a4c720a00bd Specifies the Session Initiation Protocol (SIP) Authentication Extensions, which defines NT LAN Manager (NTLM) and Kerberos authentication schemes based on general authentication framework guidelines. https://docs.microsoft.com/en-us/openspecs/office_protocols/MS-SIPAE/ba3e9821-fa85-4e0f-a80c-5a4c720a00bd <b>Protocol Revision:</b> 9.1<br/><b>Downloads:</b><br/><ul style="list-style-type: square;"><li><a href="https://interoperability.blob.core.windows.net/files/MS-SIPAE/[MS-SIPAE].pdf">PDF</a></li><li><a href="https://interoperability.blob.core.windows.net/files/MS-SIPAE/[MS-SIPAE]-211116.docx">DOCX</a></li></ul> Tue, 16 Nov 2021 MS-SIPAE-20211116 https://docs.microsoft.com/en-us/openspecs/office_protocols/MS-SIPAE/ba3e9821-fa85-4e0f-a80c-5a4c720a00bd <b>Protocol Revision:</b> 9.0<br/><b>Downloads:</b><br/><ul style="list-style-type: square;"><li><a href="https://interoperability.blob.core.windows.net/files/MS-SIPAE/[MS-SIPAE]-210817.pdf">PDF</a></li><li><a href="https://interoperability.blob.core.windows.net/files/MS-SIPAE/[MS-SIPAE]-210817.docx">DOCX</a></li></ul> Tue, 17 Aug 2021 MS-SIPAE-20210817 https://docs.microsoft.com/en-us/openspecs/office_protocols/MS-SIPAE/ba3e9821-fa85-4e0f-a80c-5a4c720a00bd <b>Protocol Revision:</b> 8.1<br/><b>Downloads:</b><br/><ul style="list-style-type: square;"><li><a href="https://interoperability.blob.core.windows.net/files/MS-SIPAE/[MS-SIPAE]-200818.pdf">PDF</a></li><li><a href="https://interoperability.blob.core.windows.net/files/MS-SIPAE/[MS-SIPAE]-200818.docx">DOCX</a></li></ul> Tue, 18 Aug 2020 MS-SIPAE-20200818 https://docs.microsoft.com/en-us/openspecs/office_protocols/MS-SIPAE/ba3e9821-fa85-4e0f-a80c-5a4c720a00bd <b>Protocol Revision:</b> 8.0<br/><b>Downloads:</b><br/><ul style="list-style-type: square;"><li><a href="https://interoperability.blob.core.windows.net/files/MS-SIPAE/[MS-SIPAE]-180828.pdf">PDF</a></li><li><a href="https://interoperability.blob.core.windows.net/files/MS-SIPAE/[MS-SIPAE]-180828.docx">DOCX</a></li></ul> Tue, 28 Aug 2018 MS-SIPAE-20180828 https://docs.microsoft.com/en-us/openspecs/office_protocols/MS-SIPAE/ba3e9821-fa85-4e0f-a80c-5a4c720a00bd <b>Protocol Revision:</b> 7.0<br/><b>Downloads:</b><br/><ul style="list-style-type: square;"><li><a href="https://interoperability.blob.core.windows.net/files/MS-SIPAE/[MS-SIPAE]-180724.pdf">PDF</a></li><li><a href="https://interoperability.blob.core.windows.net/files/MS-SIPAE/[MS-SIPAE]-180724.docx">DOCX</a></li></ul> Tue, 24 Jul 2018 MS-SIPAE-20180724 https://docs.microsoft.com/en-us/openspecs/office_protocols/MS-SIPAE/ba3e9821-fa85-4e0f-a80c-5a4c720a00bd <b>Protocol Revision:</b> 6.0<br/><b>Downloads:</b><br/><ul style="list-style-type: square;"><li><a href="https://interoperability.blob.core.windows.net/files/MS-SIPAE/[MS-SIPAE]-180427.pdf">PDF</a></li><li><a href="https://interoperability.blob.core.windows.net/files/MS-SIPAE/[MS-SIPAE]-180427.docx">DOCX</a></li></ul> Fri, 27 Apr 2018 MS-SIPAE-20180427 https://docs.microsoft.com/en-us/openspecs/office_protocols/MS-SIPAE/ba3e9821-fa85-4e0f-a80c-5a4c720a00bd <b>Protocol Revision:</b> 5.0<br/><b>Downloads:</b><br/><ul style="list-style-type: square;"><li><a href="https://interoperability.blob.core.windows.net/files/MS-SIPAE/[MS-SIPAE]-160914.pdf">PDF</a></li><li><a href="https://interoperability.blob.core.windows.net/files/MS-SIPAE/[MS-SIPAE]-160914.docx">DOCX</a></li></ul> Wed, 14 Sep 2016 MS-SIPAE-20160914 https://docs.microsoft.com/en-us/openspecs/office_protocols/MS-SIPAE/ba3e9821-fa85-4e0f-a80c-5a4c720a00bd <b>Protocol Revision:</b> 5.0<br/><b>Downloads:</b><br/><ul style="list-style-type: square;"><li><a href="https://interoperability.blob.core.windows.net/files/MS-SIPAE/[MS-SIPAE]-160715.pdf">PDF</a></li><li><a href="https://interoperability.blob.core.windows.net/files/MS-SIPAE/[MS-SIPAE]-160715.docx">DOCX</a></li></ul> Fri, 15 Jul 2016 MS-SIPAE-20160715