OAuth 2.0 Setup - Sign in to Jira from Salesforce

In the Configure Jira Connection screen, click on the Login button

It will open a new popup to authenticate, use a Jira account designated for this integration.

Allow access to your Jira Cloud instance (select the Jira instance in the dropdown) and Accept

Confirm the External Access and Close the popup

After closing the popup select the Jira Cloud instance URL and Save

It should show the “Connected“ status and the related integration user information