Andy Brudtkuhl

Integrate the Zendesk Web Widget into the WordPress admin to allow your users to submit help desk tickets and ask questions from inside the admin.
The widget pre-populates the logged in user\’s information with Name, Email Address, and Username. When they fill out the form it creates a help desk ticket in Zendesk passing in their information, their message, and what page they were on when they submitted the request.
This plugin is great if you are managing multiple client WordPress sites or large bases of WordPress users and want to track requests and issues with the excellent Zendesk helpdesk system.
It\’s very easy to install, customize, and work with.

Admin Zendesk Help Widget

Integrates the Zendesk Web Widget into the WordPress Admin.

vitalyu

You can create an Article in Zendesk and say WordPress to sync this article content from WordPress post/page. 
Each time you update this WordPress’s page/post it will automatically update the article in Zendesk.

WordPress Page to Zendesk Article

Wordpress Page/Post to Zendesk Article Synchronization Plugin

Admin Zendesk Help Widget vs WordPress Page to Zendesk Article