SSL Error 9F4C5638 Logging into Server from Desktop Using Mutual SSL on Desktop 2021.1.8 or Newer

Published: 14 Jun 2022
Last Modified Date: 15 Jun 2022


Tableau Desktop logins to Tableau Server using Mutual SSL fail with SSL Error 9F4C5638 after upgrading to a Tableau Desktop version released in November of 2021 or newer.  The Tableau Server Mutual SSL configuration "Use username and password if SSL authentication fails" checkbox is not selected.


  • Tableau Desktop 2021.1.8 and newer
  • Tableau Desktop 2021.2.5 and newer
  • Tableau Desktop 2021.3.4 and newer
  • Tableau Desktop 2021.4 and newer
  • Tableau Desktop 2022.1 and newer
  • Tableau Server is configured to use Mutual SSL for authentication.


As this issue is currently under investigation, here are two possible workarounds:

Option 1

Enable the option on Tableau Server to fall back to username and password if Mutual SSL fails.

This change will prevent the SSL Error in Tableau Desktop and allow for Mutual SSL logins to succeed.  Please note that this change will allow for logins without using Mutual SSL which could be unacceptable at your organization.  

Option 2

Install Tableau Desktop 2020.4.12 or higher of the 2020.4 version only.


This behavior is related to a Known Issue with ID 1389512 which is currently under investigation.

Additional Information

Configure Mutual SSL Authentication

Tableau Release Notes

Tableau Prep Builder will not produce this error when logging into Tableau Server.

If the above information does not apply to your Tableau Server installation and you are using 2021.4 or 2022.1 please check the following KB for additional information: 

Error: "Authentication failed. Error Code 84223ADA Unable to connect to Tableau Server." while Connecting from Tableau Desktop after Upgrading Tableau Server to v2021.4.x.


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