This page contains notes for migrating JIRA and Confluence authentication to use Crowd. In our internal setup, both JIRA and Confluence have separate user authentication storage databases. The structure that we re moving to has these will centralise user management inside Crowd.
These intrsuctions are for Crowd 0.3.3, JIRA 3.6.1 and Confluence 2.2.3
How to migrate existing users from JIRA and Confluence
Use the External User Importer from within the Principals screen, as shown below.

Then select Confluence and/or JIRA to import your users. If you are using JIRA, you will need to ensure that your JDBC driver is on your classpath before beginning this process as the JIRA importer accesses the database directly (the user management SOAP API's are inconsistent between the two products).