Microsoft Account App Access. You need to enable javascript to run this app During this process, microsoft will generate an application (client) id and a client secret for your application;
The account’s website provides the service with a token it can use to access your account. Register an application with the microsoft identity platform documentation. Apps and services that can access your data.
If you are a microsoft office 365 user, click the following link to access office 365 outlook web app:
How to revoke access to your microsoft account. If you agree to the prompt, that app gets access to your account. Under app passwords, click the create a new app password link. And what's more if the user use the microsoft account login windows computer, for some apps, it would prompts for the microsoft account credentials via windows credentials.