Minecraft: Java Edition is migrating all Mojang Accounts to Microsoft Accounts

Minecraft: Java Edition has historically used their own Mojang Accounts for access and saving, but now Mojang Studios is planning to migrate all current and future Mojang Accounts to

Minecraft will require a Microsoft account to play in 2021 - The Verge

Mojang Issues Warning to Players with Legacy Minecraft Accounts

Mojang reveals last date to voluntarily migrate Minecraft Java accounts

MCL-19637] Migrated Microsoft Account at Demo Mode - Jira

You might lose your Minecraft account unless you act now

3 Ways to Create a Minecraft Account - wikiHow

Java Account Migration: A Fun Announcement by Dinnerbone

Minecraft: Java Edition Demo Mode

Minecraft account migration last date is next week

Minecraft: Java Edition Login Issues FAQ

Minecraft Account Migration Deadline Set for March 2022

Can only play Minecraft Demo after Migrating Mojang Account - Microsoft Community