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<concept id="document-history">
  <title>Federated Authentication Service 2311 Document History</title>
  <conbody>
    <p>The following table describes important changes to the Federated Authentication Service 2311 documentation. To receive notifications about these updates, subscribe to the RSS feed.</p>
    <table frame="all" rowsep="1" colsep="1">
      <tgroup cols="3">
        <colspec colname="col1" colwidth="1*"/>
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        <thead>
          <row>
            <entry>Date</entry>
            <entry>Change</entry>
            <entry>Description</entry>
          </row>
        </thead>
        <tbody>
          <row>
            <entry>15 Feb 2024</entry>
            <entry>Updated information on the enhancement of Federated Authentication Service certificate to include SID.</entry>
            <entry>For more information, see <xref href="/en-us/federated-authentication-service/2311/whats-new.html" format="markdown">What's new</xref>.</entry>
          </row>
          <row>
            <entry>12 Jan 2024</entry>
            <entry>Updated information on the third party CAs to FAS.</entry>
            <entry>For more information, see <xref href="/en-us/federated-authentication-service/2311/system-requirements.html" format="markdown">System requirements</xref>.</entry>
          </row>
          <row>
            <entry>20 Dec 2023</entry>
            <entry>Initial release of Federated Authentication Service 2311.</entry>
            <entry>FAS 2311 includes internal technology upgrades to support Citrix Virtual Apps and Desktops™ 2311 along with minor issue fixes and security updates.</entry>
          </row>
        </tbody>
      </tgroup>
    </table>
  </conbody>
</concept>
