Miscellaneous topics that do not fit into specific categories.
Hello, thank you for reaching out to Microsoft Q&A.
Could you please confirm whether it is a QR code or a barcode?
Also, is this problem occurring only on a specific device you are trying to sign in from? For example, try opening an incognito/private browsing tab on your mobile browser and signing in with your Microsoft account there. Let me know if you are able to sign in successfully.
When you are asked to scan a barcode (usually a QR code is displayed if you have a passkey tied to that specific device), do you see a Cancel option similar to the one shown in the screenshot below, and can you choose a different verification method during sign-in?