How to Restore Outlook Access After Deleting Microsoft Authenticator
Question details
The user accidentally deleted the Microsoft Authenticator app from their iPhone and is unable to log in to their Outlook.com account due to two-factor authentication prompts.
- Product
- Outlook.com / Microsoft Authenticator
- Device & OS
- iPhone
- Scenario
- Attempting to regain access to an Outlook account after reinstalling the Microsoft Authenticator app.
- Observed behavior
- The user is prompted to verify a code through the Authenticator app upon login, but cannot retrieve the code or add the Outlook account as a new account in the app.
Ensure that you have access to the personal Microsoft account credentials you originally used to enable cloud backup for your Microsoft Authenticator app.
Restore Authenticator Account from Backup
Use the recovery feature in Microsoft Authenticator to restore your previous account settings from an iCloud backup instead of trying to add the account as new.
When you delete and reinstall the Microsoft Authenticator app, attempting to add your Outlook account as a new account typically fails because the login process requires a code from the very app you are trying to set up. To resolve this, you must recover your previous app configuration.
Open the newly reinstalled Microsoft Authenticator app on your iPhone.
On the initial setup screen, do not tap 'Add Account'. Instead, scroll down and tap 'Begin recovery' or 'Restore from backup'.
Enter the credentials for the personal Microsoft account that you previously used to back up your Authenticator data to iCloud.
Follow the on-screen prompts to verify your identity using alternative methods (like email or SMS) if required. Once completed, your Outlook account will appear in the app and generate the necessary MFA codes.
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Frequently Asked Questions
Why can't I just add my Outlook account as a new account in the Authenticator app?
Adding it as a new account requires you to successfully log in to Outlook first. Because two-factor authentication is active, the login process requires a code from the Authenticator app, creating a loop that prevents you from adding the account from scratch.
What happens if I didn't have cloud backup enabled for Microsoft Authenticator?
If you did not back up your Authenticator app before deleting it, you cannot restore the tokens. You will need to recover your Outlook account using alternative verification methods, such as a backup email or phone number, or by using the Microsoft Account Recovery form.
How do I ensure my Microsoft Authenticator is backed up in the future?
Open the Microsoft Authenticator app, tap the menu icon, go to Settings, and toggle on 'iCloud Backup' (on iOS) or 'Cloud Backup' (on Android). You will be prompted to sign in with a personal Microsoft account to store the backup.
Where can I get specialized help if my Authenticator backup won't restore?
Authenticator-related issues are beyond the scope of general community support. You should post your issue on the Microsoft Q&A platform under the 'microsoft-authenticator' tag for specialized technical assistance.




