We're about to move to using Active Directory to authenticate our users to Jira and Confluence. Currently, Confluence uses the Jira user directory. There's only one problem I can see. One user has a mismatched username - on Jira, they're firstname.l, where l is last initial. On AD, they're just firstname. What's the easiest way to change their username to (or move all their stuff to a new user called) firstname?
From https://confluence.atlassian.com/adminjiraserver070/create-edit-or-remove-a-user-794199053.html
I used this procedure before merging the Jira directory with AD and Confluence updated just fine.