What is user_id that Auth0 Gets from Azure AD Login

Last Updated: Feb 20, 2026

Overview

On an Azure AD connection, if just the basic profile is configured what exactly is the user_id that comes across into the identities array, and what does Auth0 pull from Azure AD

Applies To

WAAD (Azure AD) connections
ID TOKEN

Solution

When using WAAD (Azure AD) connections with V2 and Basic Attributes, what happens is that we use what’s sent in the ID TOKEN https://learn.microsoft.com/en-us/azure/active-directory/develop/id-tokens#claims-in-an-id-token

I expect the user_id will come from the sub claim in the ID TOKEN from Azure