At the moment there is no available option for disabling "Remember My Login on this computer" feature via the Admin console.
However, there is a feature request available.

As a workaround, one can make modification to the velocity file login.vm. This would require a server restart nevertheless.

The steps required are as follow:

  • Stop Confluence
  • Go to your confluence install directory
  • Locate the <CONFLUENCE-INSTALL>/confluence/login.vm file and make a back up copy
  • Open the file. Locate the following code and comment it out.
<!--
<p>
    <div class="steplabel" style="width: 150px;"><input type="checkbox" name="os_cookie" id="os_cookie_id" value="true" tabindex="3"/></div>
    <label for="os_cookie_id" accesskey="r">$action.getText("remember.accesskey")</label>
</p>
-->
  • Save the file and restart Confluence
  • Repeat the steps when you install a new version of Confluence

Note: The code above is already commented out.