ISSUE
Users attempting to log in to Cisco Webex Meetings, may encounter an error message stating: "User Authentication Failed, Reason: No user account found in the system (3)." This error prevents the user from successfully logging in and accessing the service.

RESOLUTION
To resolve this issue, follow these steps:

1. Verify User Account in Active Directory
   • Ensure that the user's account has been properly added to the company's Active Directory.
   •  If you are unsure how to verify this, consult with your company's helpdesk or IT support team for assistance.
2. Enable Auto Account Creation
   •  Check if auto account creation is enabled on your Cisco Webex Meetings Site Administration.
   • If you are a Site Administrator, log in to the Webex Site Administration portal and navigate to the configuration settings to enable auto account creation for SSO.
   •  If you do not have administrative access, contact your Cisco Webex Meetings Site Administrator to ensure that this setting is enabled.
3. Contact Technical Support
   • If the above steps do not resolve the issue, or if you need further assistance, contact Technical Support.

CAUSE
The error message "User Authentication Failed, Reason: No user account found in the system (3)" typically occurs under the following circumstances:

• The user is trying to log in using Single Sign-On (SSO), but the authentication process fails because the user's account cannot be located within the system.
• The user's account does not exist in the system's database, which could be due to the account not being created or having been deleted.
• The system is configured to automatically create user accounts upon SSO login, but this feature is not enabled, leading to a failure in creating an account for the user.