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To help point you in the right direction, could you please provide the exact error message you see when you try to sign in with your Microsoft account?
Please keep in mind that even Microsoft support has limited options when it comes to account-related issues, especially for security and privacy reasons. That’s why having the correct error message is important. This will help us to determine whether the issue can be resolved through standard steps or if you need to go through one of Microsoft’s official support channels for further assistance.
We will be waiting for your reply.