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    <title>[MS-ASCAL]: Exchange ActiveSync: Calendar Class Protocol</title>
    <link>https://docs.microsoft.com/en-us/openspecs/exchange_server_protocols/MS-ASCAL/0c448682-4a6a-459a-ae66-2fed0712bef9</link>
    <description>Specifies the Exchange ActiveSync: Calendar Class Protocol, which is used for the interchange of calendar data.</description>
    <item>
      <title>Major Update for [MS-ASCAL] (Version 22.0)</title>
      <link>https://docs.microsoft.com/en-us/openspecs/exchange_server_protocols/MS-ASCAL/0c448682-4a6a-459a-ae66-2fed0712bef9</link>
      <description>&lt;b&gt;Protocol Revision:&lt;/b&gt; 22.0&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.microsoft.com/files/MS-ASCAL/[MS-ASCAL].pdf"&gt;PDF&lt;/a&gt;&lt;/li&gt;&lt;li&gt;&lt;a href="https://msopenspecs.microsoft.com/files/MS-ASCAL/[MS-ASCAL]-250520.docx"&gt;DOCX&lt;/a&gt;&lt;/li&gt;&lt;/ul&gt;</description>
      <pubDate>Tue, 20 May 2025</pubDate>
      <guid>MS-ASCAL-20250520</guid>
    </item>
    <item>
      <title>Major Update for [MS-ASCAL] (Version 21.0)</title>
      <link>https://docs.microsoft.com/en-us/openspecs/exchange_server_protocols/MS-ASCAL/0c448682-4a6a-459a-ae66-2fed0712bef9</link>
      <description>&lt;b&gt;Protocol Revision:&lt;/b&gt; 21.0&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.microsoft.com/files/MS-ASCAL/[MS-ASCAL]-220429.pdf"&gt;PDF&lt;/a&gt;&lt;/li&gt;&lt;li&gt;&lt;a href="https://msopenspecs.microsoft.com/files/MS-ASCAL/[MS-ASCAL]-220429.docx"&gt;DOCX&lt;/a&gt;&lt;/li&gt;&lt;/ul&gt;</description>
      <pubDate>Fri, 29 Apr 2022</pubDate>
      <guid>MS-ASCAL-20220429</guid>
    </item>
    <item>
      <title>Minor Update for [MS-ASCAL] (Version 20.1)</title>
      <link>https://docs.microsoft.com/en-us/openspecs/exchange_server_protocols/MS-ASCAL/0c448682-4a6a-459a-ae66-2fed0712bef9</link>
      <description>&lt;b&gt;Protocol Revision:&lt;/b&gt; 20.1&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.microsoft.com/files/MS-ASCAL/[MS-ASCAL]-201117.pdf"&gt;PDF&lt;/a&gt;&lt;/li&gt;&lt;li&gt;&lt;a href="https://msopenspecs.microsoft.com/files/MS-ASCAL/[MS-ASCAL]-201117.docx"&gt;DOCX&lt;/a&gt;&lt;/li&gt;&lt;/ul&gt;</description>
      <pubDate>Tue, 17 Nov 2020</pubDate>
      <guid>MS-ASCAL-20201117</guid>
    </item>
    <item>
      <title>Major Update for [MS-ASCAL] (Version 20.0)</title>
      <link>https://docs.microsoft.com/en-us/openspecs/exchange_server_protocols/MS-ASCAL/0c448682-4a6a-459a-ae66-2fed0712bef9</link>
      <description>&lt;b&gt;Protocol Revision:&lt;/b&gt; 20.0&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.microsoft.com/files/MS-ASCAL/[MS-ASCAL]-181001.pdf"&gt;PDF&lt;/a&gt;&lt;/li&gt;&lt;li&gt;&lt;a href="https://msopenspecs.microsoft.com/files/MS-ASCAL/[MS-ASCAL]-181001.docx"&gt;DOCX&lt;/a&gt;&lt;/li&gt;&lt;/ul&gt;</description>
      <pubDate>Mon, 01 Oct 2018</pubDate>
      <guid>MS-ASCAL-20181001</guid>
    </item>
    <item>
      <title>Major Update for [MS-ASCAL] (Version 19.0)</title>
      <link>https://docs.microsoft.com/en-us/openspecs/exchange_server_protocols/MS-ASCAL/0c448682-4a6a-459a-ae66-2fed0712bef9</link>
      <description>&lt;b&gt;Protocol Revision:&lt;/b&gt; 19.0&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.microsoft.com/files/MS-ASCAL/[MS-ASCAL]-180724.pdf"&gt;PDF&lt;/a&gt;&lt;/li&gt;&lt;li&gt;&lt;a href="https://msopenspecs.microsoft.com/files/MS-ASCAL/[MS-ASCAL]-180724.docx"&gt;DOCX&lt;/a&gt;&lt;/li&gt;&lt;/ul&gt;</description>
      <pubDate>Tue, 24 Jul 2018</pubDate>
      <guid>MS-ASCAL-20180724</guid>
    </item>
    <item>
      <title>No Update for [MS-ASCAL] (Version 18.0)</title>
      <link>https://docs.microsoft.com/en-us/openspecs/exchange_server_protocols/MS-ASCAL/0c448682-4a6a-459a-ae66-2fed0712bef9</link>
      <description>&lt;b&gt;Protocol Revision:&lt;/b&gt; 18.0&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.microsoft.com/files/MS-ASCAL/[MS-ASCAL]-170418.pdf"&gt;PDF&lt;/a&gt;&lt;/li&gt;&lt;li&gt;&lt;a href="https://msopenspecs.microsoft.com/files/MS-ASCAL/[MS-ASCAL]-170418.docx"&gt;DOCX&lt;/a&gt;&lt;/li&gt;&lt;/ul&gt;</description>
      <pubDate>Tue, 18 Apr 2017</pubDate>
      <guid>MS-ASCAL-20170418</guid>
    </item>
    <item>
      <title>Major Update for [MS-ASCAL] (Version 18.0)</title>
      <link>https://docs.microsoft.com/en-us/openspecs/exchange_server_protocols/MS-ASCAL/0c448682-4a6a-459a-ae66-2fed0712bef9</link>
      <description>&lt;b&gt;Protocol Revision:&lt;/b&gt; 18.0&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.microsoft.com/files/MS-ASCAL/[MS-ASCAL]-170228.pdf"&gt;PDF&lt;/a&gt;&lt;/li&gt;&lt;li&gt;&lt;a href="https://msopenspecs.microsoft.com/files/MS-ASCAL/[MS-ASCAL]-170228.docx"&gt;DOCX&lt;/a&gt;&lt;/li&gt;&lt;/ul&gt;</description>
      <pubDate>Tue, 28 Feb 2017</pubDate>
      <guid>MS-ASCAL-20170228</guid>
    </item>
    <item>
      <title>Major Update for [MS-ASCAL] (Version 17.0)</title>
      <link>https://docs.microsoft.com/en-us/openspecs/exchange_server_protocols/MS-ASCAL/0c448682-4a6a-459a-ae66-2fed0712bef9</link>
      <description>&lt;b&gt;Protocol Revision:&lt;/b&gt; 17.0&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.microsoft.com/files/MS-ASCAL/[MS-ASCAL]-160609.pdf"&gt;PDF&lt;/a&gt;&lt;/li&gt;&lt;li&gt;&lt;a href="https://msopenspecs.microsoft.com/files/MS-ASCAL/[MS-ASCAL]-160609.docx"&gt;DOCX&lt;/a&gt;&lt;/li&gt;&lt;/ul&gt;</description>
      <pubDate>Thu, 09 Jun 2016</pubDate>
      <guid>MS-ASCAL-20160609</guid>
    </item>
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