What is SharePoint online default authentication method? And which credential flow it is using to authenticate?

 

Here I have explained SharePoint online default authentication method and which credential flow it is using to authenticate:

The default authentication method for SharePoint Online is OAuth 2.0 and it uses the authorization code grant flow to authenticate users. This means that the user first logs in through an identity provider (such as Microsoft Account or Azure Active Directory) and then receives an authorization code which is then exchanged for an access token. This access token is then used to access the SharePoint Online resources on behalf of the user.


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