Firdaus Zahari

The plugin allows you to disable selected users from your site’s user list. A disabled user will NOT be allowed to:
<ul>
<li>Log in to the site</li>
<li>Reset their associated password</li>
<li>Create a new application password</li>
</ul>
In addition, they’ll also automatically logged out from all sessions as soon as they are disabled.

FS Disable Users

Disable selected users from various site activities including preventing them from logging in, resetting passwords, and creating application passwords …

Yogesh Pant

Easy Username updater is a plugin which allows administrators to change usernames on their site. It provide list of users with their email address,username and role. It changes display name as well.
This plugin also do following:
<ol>
<li>Search the user by username, email address, or role.</li>
<li>Send the updated username to user by email.</li>
</ol>
How to install?
<ol>
<li>Unzip the downloaded ‘username-updater.zip’ file</li>
<li>Upload the ‘username-updater’ folder to ‘/wp-content/plugins’ directory of your WordPress installation</li>
<li>Activate the plugin via the WordPress Plugins page</li>
<li>A new submenu will automatically create on users menu</li>
</ol>

Easy Username Updater

Randomly came across this plugin and needed to update some usernames, my goodness, it worked perfectly.

It does what it says, easily


This plugin forces notifications from donotreply@site.com. This tripped security measures on a site I'm working on. 



The issue has been mentioned over three years ago yet still exist. I do not recommend this plugin.


unresolved wp_mail From bug for at least 3 years


Congrats on your fantastic plugin!



It would be great to have an option to change the slug along with the username. Also, a hint about purging object cache (e.g., for LiteSpeed users) would be helpful.



Thanks!


Helpful

A plugin to change registered username and display name.

FS Disable Users vs Easy Username Updater