The information here — https://confluence.atlassian.com/bitbucket/synchronize-an-account-371360175.html — seems to be out of date.
We'd like to link existing Bitbucket branches and pull requests with their corresponding JIRA issues. Our Bitbucket repositories are linked on the JIRA DVCS Accounts page, and our branch names and pull request titles contain the JIRA issue keys.
Links to the JIRA issues are automatically showing up on the Bitbucket pull requests which is great, but links to the branches and pull requests are not showing up on the JIRA issues themselves.