Authentication Methods option not visible under Security
Platform Notice: Data Center Only - This article only applies to Atlassian products on the Data Center platform.
Note that this KB was created for the Data Center version of the product. Data Center KBs for non-Data-Center-specific features may also work for Server versions of the product, however they have not been tested. Support for Server* products ended on February 15th 2024. If you are running a Server product, you can visit the Atlassian Server end of support announcement to review your migration options.
*Except Fisheye and Crucible
Summary
Customer with Admin access is unable to see the option 'Authentication methods' under System >> Security
Environment
Jira server/DC versions above 7.13.0
Diagnosis
Go to System >> Security and you might not find the 'Authentication methods' option. This option would be required to add a new authentication configuration or to disable/enable the basic authentication for API calls in Jira.

Cause
The 'atlassian-authentication-plugin' is either disabled or uninstalled from the instance.
Confirm this by checking the pluginstate table by using the below command -
1
select * from pluginstate where pluginkey = 'com.atlassian.plugins.authentication.atlassian-authentication-plugin';
Cause 1 :
The plugin is uninstalled from the instance. In this case, the above query will not return any results.
Cause 2 :
The plugin is disabled in the instance. In this case, the above query will return pluginenabled value as false.
Solution
Solution for cause 1 :
Go to Jira administration >> Manage apps >> Find new apps and install the 'SSO for Datacenter' by Atlassian
Solution for cause 2 :
Go to Jira administration >> Manage apps >> search for the 'SSO for Datacenter' by Atlassian and enable it
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