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    <title>[MS-SIPREGE]: Session Initiation Protocol (SIP) Registration Extensions</title>
    <link>https://docs.microsoft.com/en-us/openspecs/office_protocols/MS-SIPREGE/21acf797-984c-48ce-97e3-c7df5c776b3d</link>
    <description>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.</description>
    <item>
      <title>No Update for [MS-SIPREGE] (Version 16.0)</title>
      <link>https://docs.microsoft.com/en-us/openspecs/office_protocols/MS-SIPREGE/21acf797-984c-48ce-97e3-c7df5c776b3d</link>
      <description>&lt;b&gt;Protocol Revision:&lt;/b&gt; 16.0&lt;br/&gt;&lt;b&gt;Downloads:&lt;/b&gt;&lt;br/&gt;&lt;ul style="list-style-type: square;"&gt;&lt;li&gt;&lt;a href="https://msopenspecs.azureedge.net/files/MS-SIPREGE/[MS-SIPREGE].pdf"&gt;PDF&lt;/a&gt;&lt;/li&gt;&lt;li&gt;&lt;a href="https://msopenspecs.azureedge.net/files/MS-SIPREGE/[MS-SIPREGE]-250218.docx"&gt;DOCX&lt;/a&gt;&lt;/li&gt;&lt;/ul&gt;</description>
      <pubDate>Tue, 18 Feb 2025</pubDate>
      <guid>MS-SIPREGE-20250218</guid>
    </item>
    <item>
      <title>Major Update for [MS-SIPREGE] (Version 16.0)</title>
      <link>https://docs.microsoft.com/en-us/openspecs/office_protocols/MS-SIPREGE/21acf797-984c-48ce-97e3-c7df5c776b3d</link>
      <description>&lt;b&gt;Protocol Revision:&lt;/b&gt; 16.0&lt;br/&gt;&lt;b&gt;Downloads:&lt;/b&gt;&lt;br/&gt;&lt;ul style="list-style-type: square;"&gt;&lt;li&gt;&lt;a href="https://msopenspecs.azureedge.net/files/MS-SIPREGE/[MS-SIPREGE]-240820.pdf"&gt;PDF&lt;/a&gt;&lt;/li&gt;&lt;li&gt;&lt;a href="https://msopenspecs.azureedge.net/files/MS-SIPREGE/[MS-SIPREGE]-240820.docx"&gt;DOCX&lt;/a&gt;&lt;/li&gt;&lt;/ul&gt;</description>
      <pubDate>Tue, 20 Aug 2024</pubDate>
      <guid>MS-SIPREGE-20240820</guid>
    </item>
    <item>
      <title>Major Update for [MS-SIPREGE] (Version 15.0)</title>
      <link>https://docs.microsoft.com/en-us/openspecs/office_protocols/MS-SIPREGE/21acf797-984c-48ce-97e3-c7df5c776b3d</link>
      <description>&lt;b&gt;Protocol Revision:&lt;/b&gt; 15.0&lt;br/&gt;&lt;b&gt;Downloads:&lt;/b&gt;&lt;br/&gt;&lt;ul style="list-style-type: square;"&gt;&lt;li&gt;&lt;a href="https://msopenspecs.azureedge.net/files/MS-SIPREGE/[MS-SIPREGE]-210817.pdf"&gt;PDF&lt;/a&gt;&lt;/li&gt;&lt;li&gt;&lt;a href="https://msopenspecs.azureedge.net/files/MS-SIPREGE/[MS-SIPREGE]-210817.docx"&gt;DOCX&lt;/a&gt;&lt;/li&gt;&lt;/ul&gt;</description>
      <pubDate>Tue, 17 Aug 2021</pubDate>
      <guid>MS-SIPREGE-20210817</guid>
    </item>
    <item>
      <title>No Update for [MS-SIPREGE] (Version 14.1)</title>
      <link>https://docs.microsoft.com/en-us/openspecs/office_protocols/MS-SIPREGE/21acf797-984c-48ce-97e3-c7df5c776b3d</link>
      <description>&lt;b&gt;Protocol Revision:&lt;/b&gt; 14.1&lt;br/&gt;&lt;b&gt;Downloads:&lt;/b&gt;&lt;br/&gt;&lt;ul style="list-style-type: square;"&gt;&lt;li&gt;&lt;a href="https://msopenspecs.azureedge.net/files/MS-SIPREGE/[MS-SIPREGE]-190319.pdf"&gt;PDF&lt;/a&gt;&lt;/li&gt;&lt;li&gt;&lt;a href="https://msopenspecs.azureedge.net/files/MS-SIPREGE/[MS-SIPREGE]-190319.docx"&gt;DOCX&lt;/a&gt;&lt;/li&gt;&lt;/ul&gt;</description>
      <pubDate>Tue, 19 Mar 2019</pubDate>
      <guid>MS-SIPREGE-20190319</guid>
    </item>
    <item>
      <title>Minor Update for [MS-SIPREGE] (Version 14.1)</title>
      <link>https://docs.microsoft.com/en-us/openspecs/office_protocols/MS-SIPREGE/21acf797-984c-48ce-97e3-c7df5c776b3d</link>
      <description>&lt;b&gt;Protocol Revision:&lt;/b&gt; 14.1&lt;br/&gt;&lt;b&gt;Downloads:&lt;/b&gt;&lt;br/&gt;&lt;ul style="list-style-type: square;"&gt;&lt;li&gt;&lt;a href="https://msopenspecs.azureedge.net/files/MS-SIPREGE/[MS-SIPREGE]-181211.pdf"&gt;PDF&lt;/a&gt;&lt;/li&gt;&lt;li&gt;&lt;a href="https://msopenspecs.azureedge.net/files/MS-SIPREGE/[MS-SIPREGE]-181211.docx"&gt;DOCX&lt;/a&gt;&lt;/li&gt;&lt;/ul&gt;</description>
      <pubDate>Tue, 11 Dec 2018</pubDate>
      <guid>MS-SIPREGE-20181211</guid>
    </item>
    <item>
      <title>Major Update for [MS-SIPREGE] (Version 14.0)</title>
      <link>https://docs.microsoft.com/en-us/openspecs/office_protocols/MS-SIPREGE/21acf797-984c-48ce-97e3-c7df5c776b3d</link>
      <description>&lt;b&gt;Protocol Revision:&lt;/b&gt; 14.0&lt;br/&gt;&lt;b&gt;Downloads:&lt;/b&gt;&lt;br/&gt;&lt;ul style="list-style-type: square;"&gt;&lt;li&gt;&lt;a href="https://msopenspecs.azureedge.net/files/MS-SIPREGE/[MS-SIPREGE]-180828.pdf"&gt;PDF&lt;/a&gt;&lt;/li&gt;&lt;li&gt;&lt;a href="https://msopenspecs.azureedge.net/files/MS-SIPREGE/[MS-SIPREGE]-180828.docx"&gt;DOCX&lt;/a&gt;&lt;/li&gt;&lt;/ul&gt;</description>
      <pubDate>Tue, 28 Aug 2018</pubDate>
      <guid>MS-SIPREGE-20180828</guid>
    </item>
    <item>
      <title>Major Update for [MS-SIPREGE] (Version 13.0)</title>
      <link>https://docs.microsoft.com/en-us/openspecs/office_protocols/MS-SIPREGE/21acf797-984c-48ce-97e3-c7df5c776b3d</link>
      <description>&lt;b&gt;Protocol Revision:&lt;/b&gt; 13.0&lt;br/&gt;&lt;b&gt;Downloads:&lt;/b&gt;&lt;br/&gt;&lt;ul style="list-style-type: square;"&gt;&lt;li&gt;&lt;a href="https://msopenspecs.azureedge.net/files/MS-SIPREGE/[MS-SIPREGE]-180724.pdf"&gt;PDF&lt;/a&gt;&lt;/li&gt;&lt;li&gt;&lt;a href="https://msopenspecs.azureedge.net/files/MS-SIPREGE/[MS-SIPREGE]-180724.docx"&gt;DOCX&lt;/a&gt;&lt;/li&gt;&lt;/ul&gt;</description>
      <pubDate>Tue, 24 Jul 2018</pubDate>
      <guid>MS-SIPREGE-20180724</guid>
    </item>
    <item>
      <title>Major Update for [MS-SIPREGE] (Version 12.0)</title>
      <link>https://docs.microsoft.com/en-us/openspecs/office_protocols/MS-SIPREGE/21acf797-984c-48ce-97e3-c7df5c776b3d</link>
      <description>&lt;b&gt;Protocol Revision:&lt;/b&gt; 12.0&lt;br/&gt;&lt;b&gt;Downloads:&lt;/b&gt;&lt;br/&gt;&lt;ul style="list-style-type: square;"&gt;&lt;li&gt;&lt;a href="https://msopenspecs.azureedge.net/files/MS-SIPREGE/[MS-SIPREGE]-180427.pdf"&gt;PDF&lt;/a&gt;&lt;/li&gt;&lt;li&gt;&lt;a href="https://msopenspecs.azureedge.net/files/MS-SIPREGE/[MS-SIPREGE]-180427.docx"&gt;DOCX&lt;/a&gt;&lt;/li&gt;&lt;/ul&gt;</description>
      <pubDate>Fri, 27 Apr 2018</pubDate>
      <guid>MS-SIPREGE-20180427</guid>
    </item>
    <item>
      <title>No Update for [MS-SIPREGE] (Version 11.1)</title>
      <link>https://docs.microsoft.com/en-us/openspecs/office_protocols/MS-SIPREGE/21acf797-984c-48ce-97e3-c7df5c776b3d</link>
      <description>&lt;b&gt;Protocol Revision:&lt;/b&gt; 11.1&lt;br/&gt;&lt;b&gt;Downloads:&lt;/b&gt;&lt;br/&gt;&lt;ul style="list-style-type: square;"&gt;&lt;li&gt;&lt;a href="https://msopenspecs.azureedge.net/files/MS-SIPREGE/[MS-SIPREGE]-171212.pdf"&gt;PDF&lt;/a&gt;&lt;/li&gt;&lt;li&gt;&lt;a href="https://msopenspecs.azureedge.net/files/MS-SIPREGE/[MS-SIPREGE]-171212.docx"&gt;DOCX&lt;/a&gt;&lt;/li&gt;&lt;/ul&gt;</description>
      <pubDate>Tue, 12 Dec 2017</pubDate>
      <guid>MS-SIPREGE-20171212</guid>
    </item>
    <item>
      <title>Minor Update for [MS-SIPREGE] (Version 11.1)</title>
      <link>https://docs.microsoft.com/en-us/openspecs/office_protocols/MS-SIPREGE/21acf797-984c-48ce-97e3-c7df5c776b3d</link>
      <description>&lt;b&gt;Protocol Revision:&lt;/b&gt; 11.1&lt;br/&gt;&lt;b&gt;Downloads:&lt;/b&gt;&lt;br/&gt;&lt;ul style="list-style-type: square;"&gt;&lt;li&gt;&lt;a href="https://msopenspecs.azureedge.net/files/MS-SIPREGE/[MS-SIPREGE]-170919.pdf"&gt;PDF&lt;/a&gt;&lt;/li&gt;&lt;li&gt;&lt;a href="https://msopenspecs.azureedge.net/files/MS-SIPREGE/[MS-SIPREGE]-170919.docx"&gt;DOCX&lt;/a&gt;&lt;/li&gt;&lt;/ul&gt;</description>
      <pubDate>Tue, 19 Sep 2017</pubDate>
      <guid>MS-SIPREGE-20170919</guid>
    </item>
    <item>
      <title>Major Update for [MS-SIPREGE] (Version 11.0)</title>
      <link>https://docs.microsoft.com/en-us/openspecs/office_protocols/MS-SIPREGE/21acf797-984c-48ce-97e3-c7df5c776b3d</link>
      <description>&lt;b&gt;Protocol Revision:&lt;/b&gt; 11.0&lt;br/&gt;&lt;b&gt;Downloads:&lt;/b&gt;&lt;br/&gt;&lt;ul style="list-style-type: square;"&gt;&lt;li&gt;&lt;a href="https://msopenspecs.azureedge.net/files/MS-SIPREGE/[MS-SIPREGE]-170627.pdf"&gt;PDF&lt;/a&gt;&lt;/li&gt;&lt;li&gt;&lt;a href="https://msopenspecs.azureedge.net/files/MS-SIPREGE/[MS-SIPREGE]-170627.docx"&gt;DOCX&lt;/a&gt;&lt;/li&gt;&lt;/ul&gt;</description>
      <pubDate>Tue, 27 Jun 2017</pubDate>
      <guid>MS-SIPREGE-20170627</guid>
    </item>
    <item>
      <title>No Update for [MS-SIPREGE] (Version 10.0)</title>
      <link>https://docs.microsoft.com/en-us/openspecs/office_protocols/MS-SIPREGE/21acf797-984c-48ce-97e3-c7df5c776b3d</link>
      <description>&lt;b&gt;Protocol Revision:&lt;/b&gt; 10.0&lt;br/&gt;&lt;b&gt;Downloads:&lt;/b&gt;&lt;br/&gt;&lt;ul style="list-style-type: square;"&gt;&lt;li&gt;&lt;a href="https://msopenspecs.azureedge.net/files/MS-SIPREGE/[MS-SIPREGE]-160914.pdf"&gt;PDF&lt;/a&gt;&lt;/li&gt;&lt;li&gt;&lt;a href="https://msopenspecs.azureedge.net/files/MS-SIPREGE/[MS-SIPREGE]-160914.docx"&gt;DOCX&lt;/a&gt;&lt;/li&gt;&lt;/ul&gt;</description>
      <pubDate>Wed, 14 Sep 2016</pubDate>
      <guid>MS-SIPREGE-20160914</guid>
    </item>
    <item>
      <title>Major Update for [MS-SIPREGE] (Version 10.0)</title>
      <link>https://docs.microsoft.com/en-us/openspecs/office_protocols/MS-SIPREGE/21acf797-984c-48ce-97e3-c7df5c776b3d</link>
      <description>&lt;b&gt;Protocol Revision:&lt;/b&gt; 10.0&lt;br/&gt;&lt;b&gt;Downloads:&lt;/b&gt;&lt;br/&gt;&lt;ul style="list-style-type: square;"&gt;&lt;li&gt;&lt;a href="https://msopenspecs.azureedge.net/files/MS-SIPREGE/[MS-SIPREGE]-160715.pdf"&gt;PDF&lt;/a&gt;&lt;/li&gt;&lt;li&gt;&lt;a href="https://msopenspecs.azureedge.net/files/MS-SIPREGE/[MS-SIPREGE]-160715.docx"&gt;DOCX&lt;/a&gt;&lt;/li&gt;&lt;/ul&gt;</description>
      <pubDate>Fri, 15 Jul 2016</pubDate>
      <guid>MS-SIPREGE-20160715</guid>
    </item>
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