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January 13, 2026 edited
Hello,
Welcome to community :)
To change your authenticator app for Jira, log into your Atlassian account, go to your profile, find Two-step verification, unlock settings, and then manage the Authentication app, where you can disable the old one and set up the new app by scanning a QR code and saving backup codes. This process effectively links your new authenticator disabling the previous connection
Assuming your account is un-managed (and unclaimed by an organization), you should be able to adjust your 2FA or authentication settings by visiting your Account Settings. You can get here via https://id.atlassian.com/manage-profile.
The references provided by @Robert DaSilva are for Atlassian Cloud accounts. The tags on your post say "data center" . Does this concern an account for logging into a data center instance or a Cloud instance?
Was the login provided to you by an organization or did you register the account yourself?
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