After changed an username from xxx@example.com to yyy@example.com, on the Google Apps interface, Atlassian On Demand ended up with 2 accounts. As the first user has many ticket issues associated to him, it's not a good option delete his account and then update everything to the new user, so i think that merge both account is the natural way to go, but i didn't find this option in the user management interface.
How can this be accomplished?