<p>A couple of weeks ago we have posted an article about <a href="https://www.wincert.net/cast/microsoft-ends-support-for-adobe-flash-player/">Microsoft ending support for the Adobe Flash Player</a>.</p>
<p>Since then, sysadmins are having hard times because many legacy applications that still use or rely on Flash stopped working properly. Luckily there is a solution to this problem.</p>
<p>In order to mitigate this problem, we&#8217;ll have to use the <strong>mms.cfg</strong> file and disable the <em>kill switch</em>.</p>
<p>To do this, on a client that requires Flash, please navigate to the following folder:</p>
<p><strong>C:\Windows\System32\Macromed\Flash (for 32-bit systems)</strong><br />
<strong>C:\Windows\SysWow64\Macromed\Flash (for 64-bit systems)</strong></p>
<p><img class="alignnone size-full wp-image-4071" src="https://www.wincert.net/wp-content/uploads/2021/01/flash-mitigate.png" alt="" width="511" height="266" /></p>
<p>Before editing <strong>mms.cfg</strong> right-click on the file and click properties. Now click <strong>Edit</strong> and Select <strong>Users</strong> and under permissions check the <strong>Modify</strong> checkbox. Click Apply and then <strong>OK</strong>.</p>
<p><img class="alignnone wp-image-4074 size-full" src="https://www.wincert.net/wp-content/uploads/2021/01/flash-mitigate-2.png" alt="How to use Flash after it's EOL date" width="691" height="331" /></p>
<p>Now <strong>double-click</strong> on the <strong>mms.cfg</strong> file and in the prompt select <strong>Notepad</strong>.</p>
<p>Edit the file in notepad and paste the following information:<br />
<code>EOLUninstallDisable=1<br />
SilentAutoUpdateEnable=0<br />
EnableAllowList=1<br />
AutoUpdateDisable=1<br />
ErrorReportingEnable=1<br />
AllowListUrlPattern=https://my-site:8443<br />
</code></p>
<p>Under <strong>AllowListUrlPattern</strong> valued type your site that requires Flash. If there&#8217;s a need to use more sites on one client copy the <strong>AllowListUrlPattern=</strong> in the next line and insert another site. Save the file and restart your browser.</p>
<p>That&#8217;s it. Hope this guide helps!</p>

How to use Flash after the EOL date
