How to complete mandatory migration in Minecraft Java Edition

Today is the final day for Minecraft players to migrate their accounts to Microsoft. Mojang has been asking players to migrate their accounts to Microsoft for a long time and today is the deadline.

Minecraft's last call to migrate: How not to lose your account after the Microsoft acquisition - Meristation

You won't be able to play Minecraft Java Edition after THIS date; find out why

Mojang Studios begins its mandatory Microsoft Account requirement for Minecraft: Java Edition

This is an actual OG account. I think it might give you the red cape. If you have less than that I will cancel order. Too many fake profiles and bots

MINECRAFT JAVA EDITION (PC) (Need A Microsoft email account to migrate it)

A Microsoft Account Will Now Be Required To Play All Minecraft Games

Microsoft Account Migration Authentication - Free Coin Boosters!, Page 10

Account Migration is Back, AND PEOPLE ARE ANGRY

Microsoft Account Migration FAQ

All Minecraft games will soon require a Microsoft account including Minecraft Java Edition

Double check that required/forced migration shows up correctly in the UI · Issue #4317 · MultiMC/Launcher · GitHub