Другие темы, которые не попадают под определенные категории.
This is posted in the Russian section, but since you are using English, the content below has been written in this language. Let me know if you want to change to a different option.
I can feel your confusion, Alex Samyraj.
To make sure I can give most suitable guidance, can I ask what is your phone model (iOS or Android), and what exactly is the third-party service you're trying to sign into?
Another thing to note is that according to Microsoft's official article: push notifications do not support non-Microsoft accounts. So, when the number-matching window appears, is it a Microsoft sign-in page, or is it displayed directly by the third-party service?
For the former case, if you're actually trying to sign in with a personal Microsoft account in a third-party service, then make sure the device needs to be registered first. Since we're not certain what's happening yet, please review the following steps one more time to see if you got it correctly:
- Go to https://account.microsoft.com/security and sign in.
- Select Manage how I sign in > check if Authenticator is currently listed e.g.
- If it is, expand and Remove that > Add another way to sign in to your account
- Use an app > open Authenticator > add an account > scan a QR Code.
- Finish the registration and completely close the application.
- Sign out of the Account page above > sign back in
- Choose to send notification > test if it works.
Sometimes the push notifications won't go through if you are in the application itself, so closing it is something worth trying. Make sure the phone is connected to the Internet.