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Merging two JIRA instances

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If you have several JIRA instances in your organisation, you may want to combine them into a single instance for easier management and administration.

The process of merging JIRA data from multiple JIRA instances is currently not officially supported by Atlassian; however, a number of tools to achieve this have been contributed by the community and are available from:

http://confluence.atlassian.com/display/JIRA/Merging+2+JIRA+instances