---
title: "Configure an Out-of-band authentication method"
slug: "dpo-configure-an-out-of-band-authentication-method"
updated: 2026-10-27T20:13:33Z
published: 2026-10-27T20:13:33Z
canonical: "docs.onespan.com/dpo-configure-an-out-of-band-authentication-method"
---

> ## 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.

# Configure an Out-of-band authentication method

## Introduction

When your desktop computer or laptop doesn’t support FIDO2 authentication, you can use a mobile device to authenticate. This is called out-of-band (OOB) authentication. To support OOB authentication, you must configure both the Auth Server and your client apps. For more information, see *Out-of-band Authentication* in the [iOS](/dpoa/docs/s3suite94-implementing-authentication-in-your-app-1#outofband-authentication), [Android](/dpoa/docs/s3suite94-android-implementing-authentication-in-your-app-1#outofband-authentication), and [Web](/dpoa/docs/s3suite94-web-implementing-authentication-in-your-web-app-1#outofband-authentication) Developer Guides.

The instructions in this section assume that you are using the DigipassONE API Server as part of standard integration. If you have implemented your own proxy in place of the API Server, [contact OneSpan customer support](mailto:support@onespan.com) for the configuration changes you need to make for OOB.

Formerly known as Digipass S3.