---
title: "Simple user name resolution"
slug: "oas-pg-simple-user-name-resolution-3-28"
updated: 2025-07-04T10:04:30Z
published: 2025-07-07T13:58:21Z
canonical: "docs.onespan.com/oas-pg-simple-user-name-resolution-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.

# Simple user name resolution

If neither Windows user name resolution (see [Windows user name resolution](/sec/docs/oas-pg-windows-user-name-resolution-3-28)) nor Active Directory user name resolution is used, the following formats are available to verify a user ID and domain:

- Similar format to user principal name (UPN), e.g. user@domain, sam@fqdn
- Separate user ID and domain fields

If the user@domain format is used for the user ID, OneSpan Authentication Server looks for a domain record with the name given after the '@'. If the domain is found, the @domain part is stripped from the user ID before the authentication process continues.

If no domain is found, the user ID will be left as user@domain, and no domain will be identified. In that case, the default domain is used for this logon attempt (see [Default domain](/sec/docs/oas-pg-default-domain-3-28)).