HiStephen Wood2
Greetings!
Thank you for posting in Microsoft Community.
Based on the description you posted, it seems that you have an issue with Outlook wherein you want to know how you can remove the Microsoft Authenticator app.
Let’s work together in finding the best solution to this issue.
For me to better understand the issue, I’d like to ask a few questions:
• We would like to confirm if your current concern is about how you can remove your account from the Microsoft Authenticator app?
In the meantime, if your current concern is all about removing your account from the Microsoft authenticator app. You can follow the steps provided down below:
Q: How do I remove an account from the app?
A: Tap the account tile for the account you’d like to remove from the app to view the account full screen. Tap Remove account to remove the account from the app.
If you have a device that is registered with your organization, you might need an extra step to remove your account. On these devices, Authenticator is automatically registered as a device administrator. If you want to completely uninstall the app, you need to first unregister the app in the app settings.
Referenced link: Common questions about the Microsoft Authenticator app - Microsoft Support
Let me know if this helps,
Sincerely
Khou Sun
Microsoft Community Moderator