How to fix the Microsoft Teams error code 4c7 Quick Guide

How to fix the Microsoft Teams error code 4c7 [Quick Guide]

The problem is caused by users trying to sign in to Microsoft Teams from a corporate network where Active Directory Federation Services (ADFS) is running.

This will not allow you to log in, and will also display the follwoing error message:

Modern authentication failed here, but you’ll still be able to sign in. Your status code is 4c7.

This setting is not enabled by default for deploying ADFS on the Intranet, so it needs to be activated manually. Read on to find out exactly what to do to activate it.

How can I fix the 4c7 error in Microsoft Teams?

1. Enable Forms Authentication

To solve this issue once and for all, you will need to enable Forms Authentication by using the ADFS Microsoft Management Console (MMC).

You can find this snap-in on the computer where the local Active Directory is located.

Plus, you can always have the alternative in mind. Take a closer look at our dedicated guide to the best collaboration software for small businesses, and find the right one for your needs.

2. Verify if Microsoft Teams is turned off

Microsoft Teams is part of the Microsoft Office 365 suite and is intended for team collaboration of members. Of course, companies have control over the applications that are offered to employees.

Therefore, when you see the 4c7 error code in Microsoft Teams, it is good to check if Teams was accidentally disabled.

In this quick fix article, we explored the best way to deal with the Modern authentication failed here, but you’ll still be able to sign in. Your status code is 4c7 error message inside Microsoft Teams.

We hope that this guide managed to solve your problem and that now you can log into your Microsoft Teams account without any issues.

Please feel free to let us know if you found this guide helpful. You can do so by leaving a comment in the section found below this article.

Still having issues? Fix them with this tool:

Modern authentication failed, Your status code is 4c7 – Microsoft Teams error

Microsoft Teams is a unified communication and collaboration platform that combines persistent workplace chat, video meetings, file storage, and application integration. If when you try sign in to Microsoft Teams when you connect from a corporate network in which Active Directory Federation Services (AD FS) is installed and you encounter the “Modern authentication failed” error message, then this post might interest you. In this post, we will identify the potential cause and as well provide the possible solution that you can try to help resolve this issue.

Modern authentication failed, Status code 4c7 – Microsoft Teams

When the authentication fails, you’ll receive the error message as described below:

Modern authentication failed here, but you’ll still be able to sign in. Your status code is 4c7.

And if you check the logs, you may see information similar to the following:

DateTime< 7124> — info — SSO: SSO requires credential. Status: caa10001. Attempting windows auth.
DateTime< 7124> — info — SSO requires credential. Status: caa10001. Attempting windows auth. diag:1
DateTime<7124> — info — SSO: (Non domain joined) No user present. Status: 3399548929
DateTime<7124> — error — SSO: ssoerr – (status) Unable to get errCode. Err:Error: ADAL error: 0xCAA10001SSO: ssoerr – (status) Unable to get errorDesc. Err:Error: ADAL error: 0xCAA10001

According to Microsoft, this error occurs because Microsoft Teams requires Forms Authentication. When you deploy AD FS, Forms Authentication is not enabled for the intranet by default.

Form-based authentication is a term of art in the context of Web and Internet-based online networked computer systems. In general, it refers to the notion of a user being presented with an editable “form” to fill in and submit in order to log into some system or service.

The advantage of form authentication is that users do not have to be a member of a domain-based network to have access to your application. So the number of web applications uses the form of authentication in their web application.

If Windows Integrated Authentication fails, you are prompted to sign in by using Forms Authentication.

Date: April 5, 2020 Tags: Teams

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Obinna Onwusobalu, has studied Information & Communication Technology and is a keen follower of the Windows ecosystem. He runs a computer software clinic. He says it’s best practice to create a System Restore Point before making any changes to your PC.