Problem

There is no UI option for setting this behavior, but it is possible to achieve this by customizing the Service Management JAR pakage. Please notice that since this is a customization, this change is not officially supported.

Workaround

    This is the JAR that needs to be modified: <jira-home>/plugins/installed-plugins/jira-servicedesk-X.X.X.jar

1.     Create a temporary folder and extract the jira-servicedesk-X.X.X.jar file there.
2.     You will need to find the following file cv-login-form.soy, probably at /servicedesk/customer/feature/login/loginform/ folder.

3.     You will need to find and remove the checked=" " atribute in the following content:

   <div class="buttons-container">
           <div class="buttons">
              
    <input class="aui-button {if $login.googleApps.enabled == false}aui-button-primary{/if} aui-style" type="submit" 
   value="{getText('cv.login.submit.label')}" id="js-login-submit">
               <span class="cv-status js-status"></span>
           </div>
           <input type="checkbox" class="checkbox remember-login" id="form-remember-login" name="os_cookie" checked="">
           <label for="form-remember-login">{getText('cv.login.remember.me')}</label>
       </div>
   

4.    Create a new JAR container after modifying the file and name it the same as the original JAR file (e.g. jira-servicedesk-X.X.X.jar).
5.     Replace the original JAR file on the folder from where it was copied originally with the modified JAR file.
6.     Restart your Jira Instance.