Configure Tableau Server to allow Write-Back Server
Summary
To start using the Write-Back with Tableau Server it is necessary to grant permission for the extension to run when dragged to a dashboard. Source: Tableau Documentation
Granting permission in Tableau Server
Step 1: Access Tableau Server Settings
Login on Tableau Server with an administrator role account.
Go to Settings > Extensions
Step 2: Enable Write-Back
Under Enable Specific Extensions, add the Write-Back URL.
The URL can be obtained by opening the trex file on a text editor. Look for the excerpt as below, which has the URL inside the <url> tags:
<source-location> <url>https://myserver/twbe/site/default</url> </source-location>
Select Allow on Full Data Access.
Choose to Show or Hide the User Prompts. (This prompt shows up when the extension is opened the first time on a dashboard)