Since my initial account creation with atlassian our company has changed our email format. I now have two accounts. The original one "firstname.lastname@example.org" and the new one "email@example.com".
The issue is now that we are using Atlassian's Managed Accounts I can no longer login with firstname.lastname@example.org since my ADFS username is email@example.com. It seems to be causing me issues in bitbucket.
Are you able to merge firstname.lastname@example.org into email@example.com so I just have the one account? I would just deactivate and delete but it probably has a log of history within all you different systems (Atlassian Support, Atlassian Licenses, Bitbucket, etc.).