MultiMC 5 "Microsoft user authentication failed."

Plato Nitee · Jan 25, 2025

Hello,

I do in MMC 5
>"Add Microsoft"
>"Please open up https://www.microsoft.com/link in a browser and put in the code XYZ to proceed with login."
>I login, accept all etc.
>Microsoft gives me message "You have completed logging in to the MultiMC application. You can now safely close this window."

>MMC's box "Microsoft user authentication failed."

I have Win11, all updates. No idea why this doesnt work for me. (POLAND, no VPN)

Ive tried this https://support.microsoft.com/en-us/windows/using-system-file-checker-in-windows-365e0031-36b1-6031-f804-8fd86e0ef4ca

and read all topics about similar problems. Dunno

Please help me figure this out.

:)

Logan - MSFT

Hi，Plato Nitee

Great! I'm glad you found a solution to your problem and I appreciate you sharing it.

I hope you have a great day, and if you have any other questions or concerns, please feel free to ask them in the Microsoft Community. I hope I can help you next time.

Logan - MSFT

Hi，Plato Nitee

Welcome to the Microsoft Community. 

Since your language is English, we will redirect you to the English section.

We have noticed that various users have recently encountered similar issues with MultiMC failing to authenticate with Microsoft users, but we apologize, we do not have experience checking or modifying MultiMC, perhaps you need to contact the developer of the software in question for more information.

We recommend that you use the official recommended launcher to play Minecraft for the time being.

Everyone has the right to play the game the way they like.

We hope your problem will be solved soon. If you have any other concerns, please get back to us and we will continue to help you.

Best Regards,

Logan-MSFT | Microsoft Community Support Specialist

Plato Nitee

I've found the solution on Discord. DangerMage is great

"DangerMage — 28.04.2024 00:38

Gotta use a password, email code doesn't work"

NuttoX 37

Hello, Sodangidni

The official minecraft launcher doesn't have features that MultiMC has and they say if you have any problems with MultiMC contact someone from microsoft support (If logging in via microsoft).

I've been using official launcher for some time, but my friend recommended me MultiMC so I'm trying to switch.

Thanks for trying to help.

Sodangidni

Hello, NuttoX 3. I’m Arturo, a community user like you (not Microsoft), and I'll be glad to provide assistance with your inquiry today.

I take this opportunity to let you know that MultiMC5 is not an official launcher/tool for Minecraft. The only official launcher available, is the one you download from the Microsoft Store or Minecraft.net.

So, if you allow me, I recommend removing it and install the official one. Once you install the official launcher, verify if you have the same outcome or not.

https://www.minecraft.net/

If the problem is not happening on the official launcher, it's an issue with this unofficial tool you're using.

Please note that it's not possible for us to assist with unofficial apps, so I appreciate your kindness and understanding on this matter.

However, if you are not able to sign in with your account on the official Minecraft launcher, I appreciate it if you can copy and paste the error message here.

Note: Avoid sharing gamertags, emails, etc.

Regards,

Arturo.

MultiMC 5 "Microsoft user authentication failed."