---
title: "Digipass Authentication for Windows Logon Error Messages"
slug: "oas-aref-digipass-authentication-for-windows-logon-error-messages-3-28"
updated: 2025-07-04T10:04:21Z
published: 2025-07-07T13:44:54Z
canonical: "docs.onespan.com/oas-aref-digipass-authentication-for-windows-logon-error-messages-3-28"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://docs.onespan.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Digipass Authentication for Windows Logon Error Messages

| Error code | Error message | Description |
| --- | --- | --- |
| –750 | An SSL Error has occurred |  |
| –751 | SSL Certificate has expired | The server certificate is no longer valid and should be regenerated. |
| –752 | SSL Certificate not trusted | The authority used for the server certificate is not included in the machine's certification authority. |
| –753 | SSL certificate was rejected because its key usage does not permit certificate signing. | Self-signed certificates may be used as both certification authority (signing) certificates and server certificates. Commercial certificates require a separate certification authority (CA) certificate. |
| –754 | SSL handshake timed out. This can occur when connecting to a non-SSL port. | Verify the client and OneSpan Authentication Server configuration to ensure that the client is connecting to OneSpan Authentication Server using the secure port. |