Solved - Microsoft migration issue using the FTB App

How to migrate Minecraft account from Mojang to Microsoft Account

How to Purchase Minecraft: Java Edition with a Microsoft Account

Minecraft Java will move to Microsoft accounts in 2021, gets new social screen

Minecraft: How to Migrate Your Account

Is there a legal way to continue playing Minecraft without migrating to a MS account? - Discussion - Minecraft: Java Edition - Minecraft Forum - Minecraft Forum

Post-Migration Process FAQ

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

only demo mode after migration - Mojang Account / Minecraft.net Support - Archive - Minecraft Forum - Minecraft Forum

Minecraft Java Account Migration Dates Leaked – Nixinova News

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