his topic contains troubleshooting information for issues related to problems users may have when attempting to connect to DirectAccess using OTP authentication. DirectAccerss OTP related events are logged on the client computer in Event Viewer under Applications and Services Logs/Microsoft/Windows/OtpCredentialProvider. Make sure that this log is enabled when troubleshooting issues with DirectAccess OTPhttps://serialelatimp.biz/duy-beni-asculta-ma/

Failed to access the CA that issues OTP certificates
Scenario. User fails to authenticate using OTP with the error: "Authentication failed due to an internal error"

Error received (client event log). OTP certificate enrollment for user failed on CA server <CA_name>, request failed, possible reasons for failure: CA server name cannot be resolved, CA server cannot be accessed over the first DirectAccess tunnel or the connection to the CA server cannot be established.

Cause

The user provided a valid one-time password and the DirectAccess server signed the certificate request; however, the client computer cannot contact the CA that issues OTP certificates to finish the enrollment process.

Solution

On the DirectAccess server, run the following Windows PowerShell commands:

Get the list of configured OTP issuing CAs and check the value of 'CAServer': Get-DAOtpAuthentication

Make sure that the CAs are configured as a management servers: Get-DAMgmtServer -Type All

Make sure that the client computer has established the infrastructure tunnel: In the Windows Firewall with Advanced Security console, expand Monitoring/Security Associations, click Main Mode, and make sure that the IPsec security associations appear with the correct remote addresses for your DirectAccess configura tion.