[MS-XCCOSIP]: Extensible Chat Control Over Session Initiation Protocol (SIP) https://docs.microsoft.com/en-us/openspecs/office_protocols/MS-XCCOSIP/e1afc2e0-8b2d-4fa4-a162-788349202345 Specifies the Extensible Chat Control Over Session Initiation Protocol. This protocol provides messaging and control mechanism between users and the server in a persistent multiparty channel communication system. Major Update for [MS-XCCOSIP] (Version 6.0) https://docs.microsoft.com/en-us/openspecs/office_protocols/MS-XCCOSIP/e1afc2e0-8b2d-4fa4-a162-788349202345 <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-XCCOSIP/[MS-XCCOSIP].pdf">PDF</a></li><li><a href="https://interoperability.blob.core.windows.net/files/MS-XCCOSIP/[MS-XCCOSIP]-210817.docx">DOCX</a></li></ul> Tue, 17 Aug 2021 MS-XCCOSIP-20210817 Major Update for [MS-XCCOSIP] (Version 5.0) https://docs.microsoft.com/en-us/openspecs/office_protocols/MS-XCCOSIP/e1afc2e0-8b2d-4fa4-a162-788349202345 <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-XCCOSIP/[MS-XCCOSIP]-180828.pdf">PDF</a></li><li><a href="https://interoperability.blob.core.windows.net/files/MS-XCCOSIP/[MS-XCCOSIP]-180828.docx">DOCX</a></li></ul> Tue, 28 Aug 2018 MS-XCCOSIP-20180828 Major Update for [MS-XCCOSIP] (Version 4.0) https://docs.microsoft.com/en-us/openspecs/office_protocols/MS-XCCOSIP/e1afc2e0-8b2d-4fa4-a162-788349202345 <b>Protocol Revision:</b> 4.0<br/><b>Downloads:</b><br/><ul style="list-style-type: square;"><li><a href="https://interoperability.blob.core.windows.net/files/MS-XCCOSIP/[MS-XCCOSIP]-180427.pdf">PDF</a></li><li><a href="https://interoperability.blob.core.windows.net/files/MS-XCCOSIP/[MS-XCCOSIP]-180427.docx">DOCX</a></li></ul> Fri, 27 Apr 2018 MS-XCCOSIP-20180427 No Update for [MS-XCCOSIP] (Version 3.0) https://docs.microsoft.com/en-us/openspecs/office_protocols/MS-XCCOSIP/e1afc2e0-8b2d-4fa4-a162-788349202345 <b>Protocol Revision:</b> 3.0<br/><b>Downloads:</b><br/><ul style="list-style-type: square;"><li><a href="https://interoperability.blob.core.windows.net/files/MS-XCCOSIP/[MS-XCCOSIP]-160914.pdf">PDF</a></li><li><a href="https://interoperability.blob.core.windows.net/files/MS-XCCOSIP/[MS-XCCOSIP]-160914.docx">DOCX</a></li></ul> Wed, 14 Sep 2016 MS-XCCOSIP-20160914 No Update for [MS-XCCOSIP] (Version 3.0) https://docs.microsoft.com/en-us/openspecs/office_protocols/MS-XCCOSIP/e1afc2e0-8b2d-4fa4-a162-788349202345 <b>Protocol Revision:</b> 3.0<br/><b>Downloads:</b><br/><ul style="list-style-type: square;"><li><a href="https://interoperability.blob.core.windows.net/files/MS-XCCOSIP/[MS-XCCOSIP]-160715.pdf">PDF</a></li><li><a href="https://interoperability.blob.core.windows.net/files/MS-XCCOSIP/[MS-XCCOSIP]-160715.docx">DOCX</a></li></ul> Fri, 15 Jul 2016 MS-XCCOSIP-20160715