Minecraft Java Edition Now Requires a Microsoft Account

It's all about increasing security and ensuring all Minecraft games on PC are connected to the same account.
It's all about increasing security and ensuring all Minecraft games on PC are connected to the same account.

Microsoft says starting next year all Minecraft Java edition users will have to have a Microsoft account to play

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Minecraft Java Edition will soon require a Microsoft account - Neowin

Minecraft Launcher – Minecraft Wiki

Minecraft Launcher – Minecraft Wiki

You might lose your Minecraft account unless you act now

So basically I can't play MC without an internet connection in the new launcher : r/Minecraft