Configuring OAuth throws "An application link from the remote application to this application is required to configure this authentication provider" error
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
Symptoms
Configuring "Outgoing Authentication" on an application link using OAuth throws the following error:
This error message is thrown even though the other application really does have a link to JIRA.
Diagnosis
In browser's console, there is error 400 (Bad Request)
Cause
The root cause is unknown. However, this could be due to IIS configuration.
Solution
Resolution
Refer to troubleshooting methods in Troubleshooting HTTP 400 Errors in IIS or contact Microsoft Support if you are using IIS as your web server.
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