Hi @Susie Bouchard ,
Welcome to our forum!
What's your account? A Microsoft account?
If you are using a school or work Microsoft account, please refer to this article to change the authentication method:
Change your two-step verification method and settings
If you are using other third-party account (such as Gmail account), please kindly understand that the Outlook tag here we mainly focus on general issues about Outlook desktop client. It's suggested that you could contact the related account support for more professional suggestions.
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