If the problem is consistently reproducible across multiple users, check your Active Directory configuration. Invalid response received by Authentication Agent. Install and register an Authentication Agent.Īuthentication Agent's password validation request timed out.Ĭheck if your Active Directory is reachable from the Authentication Agent. Reset the user's password in your on-premises Active Directory. User's Active Directory password has expired. Map the value of that field to a failure reason and resolution using the following table: Sign-in error code Navigate to Azure Active Directory -> Sign-ins on the Azure portal and click a specific user's sign-in activity. If your tenant has an Azure AD Premium license associated with it, you can also look at the sign-in activity report on the Entra admin center. Sign-in failure reasons on the Azure portal (needs Premium license) If the Azure AD Connect server isn't domain joined, a requirement mentioned in Azure AD Connect: Prerequisites, the invalid username/password issue occurs. To learn more, see Configuring Alternate Login ID. If you get the same username/password error, this means that the Pass-through Authentication agent is working correctly and the issue may be that the on-premises UPN is non-routable. When you are prompted to enter credentials, enter the same username and password that are used to sign in to ( ). Run the Invoke PowerShell command: Invoke-PassthroughAuthOnPremLogonTroubleshooter Import the PowerShell module on the agent machine: Import-Module "C:\Program Files\Microsoft Azure AD Connect Authentication Agent\Modules\PassthroughAuthPSModule\PassthroughAuthPSModule.psd1" To confirm that this is the issue, first test that the Pass-through Authentication agent is working correctly: This can happen when a user's on-premises UserPrincipalName (UPN) is different than the user's cloud UPN. Users get invalid username/password error If it continues to fail, contact Microsoft support.Īn error occurred communicating with Active DirectoryĬheck the agent logs for more information and verify that Active Directory is operating as expected. Validation encountered unpredictable WebExceptionĪ transient error. The username passed to the agent was not validĮnsure the user is attempting to sign in with the right username. If the user is unable to sign into using Pass-through Authentication, they may see one of the following user-facing errors on the Azure AD sign-in screen: ErrorĮnsure that agent servers are members of the same AD forest as the users whose passwords need to be validated and they are able to connect to Active Directory.Ī timeout occurred connecting to Active DirectoryĬheck to ensure that Active Directory is available and is responding to requests from the agents. You can check status by going to the Azure AD Connect blade on the Entra admin center. General issues Check status of the feature and Authentication AgentsĮnsure that the Pass-through Authentication feature is still Enabled on your tenant and the status of Authentication Agents shows Active, and not Inactive. Doing this step is critical and ensures that you don't get locked out of your tenant. Learn about adding a cloud-only Global Administrator account. If you are facing user sign-in issues with Pass-through Authentication, don't disable the feature or uninstall Pass-through Authentication Agents without having a cloud-only Global Administrator account or a Hybrid Identity Administrator account to fall back on.
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