After entering Github credentials (email and password) sending to another page

This is the normal GitHub-to-Microsoft account-linking page; select Next only if you want Microsoft to create a personal Microsoft account using the displayed Gmail address and link GitHub as a sign-in method.

Microsoft checks the email addresses associated with your GitHub account:

• If one matches an existing personal Microsoft account, GitHub is added as a sign-in method for that account.
• If no matching Microsoft account exists, selecting Next creates one and links it to your GitHub credentials.
• If it matches a work or school account, you may instead be prompted to sign in to that organizational account. ^1^

After linking, you can use Sign-in options → Sign in with GitHub, or enter the linked Gmail address and be redirected to GitHub. The Microsoft and GitHub accounts remain separate; linking them does not give Microsoft access to your GitHub repositories. Repository access requires separate permission. ^1^

This process creates a personal Microsoft account. It does not by itself create a Microsoft 365 subscription, transfer billing, or create a work/school account. Personal Microsoft accounts are used for consumer services such as Microsoft 365, Outlook.com, and Xbox; organizational accounts are issued by a school or employer. ^2^

If you did not intend to create or link a Microsoft account, do not select Next—return to the previous page or close the sign-in window.

References

1. Link your GitHub account and Microsoft account | Microsoft Support
2. How to sign in to a Microsoft account | Microsoft Support