Signing in to Microsoft Teams will sometimes let you encounter errors such as the Status Code 4c7. Microsoft Teams is widely used by businesses and organizations as an online collaboration tool. But, despite its popularity, many users still encounter several errors.
Status Code 4c7 error: “Modern authentication failed here, but you’ll still be able to sign in. Your status code is 4c7.”
You may also see similar information in the logs,
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
The error occurs when users try to sign in from a corporate network that has the Active Directory Federation Services (ADFS) running. By default, Forms Authentication is disabled in ADFS environment. You will need to enable the setting manually to fix the 4c7 Status Code error in Microsoft Teams.
Enable Forms Authentication
- Locate the computer or device where the local Active Directory is located.
- Open the ADFS Microsoft Management Console.
- On the left side of the screen, click Authentication Policies.
- On the right side of the screen, select Actions.
- Then, click Edit Global Primary Authentication.
- From there, choose Intranet tab.
- Click Forms Authentication.
- Lastly, click OK. It will then save the changes.
- Once you have enabled the Forms Authentication, you can try signing in to Microsoft Teams.
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