mikumo

<p>このプラグインを有効にすると、ユーザー削除時に「すべてのコンテンツを消去します。」を選択できなくなります。<br />
削除されるユーザー所有の記事やコンテンツを必ず別のユーザーに紐づけ直すことを強制させ、コンテンツ消失事故を未然に防ぎます。</p>
<p>WordPress 管理画面でユーザー削除時に「すべてのコンテンツを消去します。」を選択すると、削除されるユーザー所有のコンテンツ（投稿や固定ページ、メディアライブラリなど）も一緒に削除されます。<br />
この操作を知らないユーザーが誤った操作を管理画面から行い、記事やメディアライブラリの添付ファイルをまとめて削除されることが想定されます。<br />
特にメディアライブラリの添付ファイルは、完全に消失し復旧できなくなる可能性が非常に高いです。<br />
WordPress の初期設定ではメディアライブラリのゴミ箱機能が OFF であり、削除と同時に管理レコードも添付ファイルも物理的に削除されてしまうためです。<br />
また、メディアライブラリのゴミ箱機能を ON にすると、記事のような別の大きな問題が発生してしまうためオススメいたしません。</p>
<blockquote>
<p>https://qiita.com/mainy/items/2a525e9b184967e20264</p>
</blockquote>


Admin User Delete With Contents Disabled

ユーザー削除時に「すべてのコンテンツを消去します。」を選択できなくします。

WPRuby

Waseem Senjer

<p>Give a temporary limited admin. access to themes designers, plugins developers and support agents.</p>
<p>The plugin is simple and clean, it helps the administrator to create a user with a temporary access and choose which pages in your admin area which you don’t want the user to access. send the details to the user and when he finished his task, you can easily deactivate the account and activate it later.</p>
<ul>
<li><a href="https://wpruby.com/plugin/controlled-admin-access-pro?utm_source=lite&utm_medium=readme&utm_campaign=freetopro" title="Upgrade to Controlled Admin Access Pro" rel="nofollow ugc">Upgrade to Pro Now</a></li>
<li><a href="https://wpruby.com/knowledgebase_category/controlled-admin-access-pro/" title="Documentation " rel="nofollow ugc">Documentation</a></li>
</ul>
<h3>Features</h3>
<h3>Menu Filter</h3>
<p>The plugin will allow you to select admin menu items that you want to restrict for the created admin. Not only the plugin will hide the menu item from the admin but it also will block the page if they access it in some other way.</p>
<h3>Expiration Time</h3>
<p>You may don’t want to give access indefinitely, the plugin allows you to set an expiration time for the restricted admin account. After the account expires, the account will no longer be able to login into the admin dashboard. Moreover, you can always extend the expiry time or change it.</p>
<h3>Hide Admin Bar</h3>
<p>WordPress offers an admin bar to provide quick access to some pages or to perform some actions. Using the plugin, you can hide the admin bar links at the top of the page will be hidden in both the frontend and admin areas.</p>
<h3>Disable Access</h3>
<p>You can always disable the restricted admin account at any time. For example, if you gave a developer access to fix a bug or install a theme, when they finish the task you can disable their account. This will block login in using the account but it will retain the account’s information in case you wanted to give them access in the future.</p>
<h3>Pro Features</h3>
<h3>Plugins Internal Pages</h3>
<p>Take more control and restrict access to plugins’ internal pages. For example, you would like to give access to the WooCommerce Settings page, but you do not want the account to see the Payments Gateways tab. Currently, the plugin supports WooCommerce, Easy Digital Downloads and BuddyPress. In the future, we will add support for more plugins.</p>
<h3>No Password Login</h3>
<p>Add some convenience when sending access to the user, you can generate a secure login URL for the user, and the user will use the link to login into the dashboard without the need for a password. You can also disable login by a password for restricted admins, this will restrict the admin from login in using a password or sending a reset password email.</p>
<h3>Activity Log</h3>
<p>Keep track of what restricted admins have done while logged in, the plugin will log more than 20 actions such as activating/deactivating/deleting a plugin, switching a theme, deleting a theme, exporting data, publishing/deleting a post and uploading a file.</p>
<h3>Remote Logout</h3>
<p>At any given time, you can force logging out any restricted admin if you no longer need them logged in the admin dashboard. This action will log them out on all logged-in devices and locations.</p>


Controlled Admin Access

Controlled Admin Access is an excellent plugin. Just keep in mind that the access you need to provide is still controlled by WP user controls.
Ex: CF7 forms need admin access by WP. If the new user is not given admin access at WP level, the Controlled Admin Access can not provide the access. 
Have tried with different WP and CAS levels and found this behaviour. Nevertheless, the controls are very good and useful. Flip side "could be" a WP admin access has to be given and CAS filters access.

Excellent plugin

Give a temporarily limited admin access to themes designers, plugins developers and support agents.

Admin User Delete With Contents Disabled vs Controlled Admin Access