How to retrieve Microsoft Entra ID oid in session user object?

[Ludovicli973]

Hello everyone,

I'm using Authjs with the microsoft-entra-id provider in a Next.js 15 project using App Router. Here's my current setup:

// auth.ts
import NextAuth from "next-auth";
import MicrosoftEntraID from "next-auth/providers/microsoft-entra-id";

export const { handlers, auth, signIn, signOut } = NextAuth({
  providers: [
    MicrosoftEntraID({
      clientId: process.env.AUTH_MICROSOFT_ENTRA_ID_ID,
      clientSecret: process.env.AUTH_MICROSOFT_ENTRA_ID_SECRET,
      issuer: process.env.AUTH_MICROSOFT_ENTRA_ID_ISSUER,
    }),
  ],
});

When I fetch the session in a Server Component:

// components/app-sidebar.tsx
import { auth } from "@/auth";

const AppSidebar = async () => {
  const session = await auth();
  const user = session?.user;
  console.log(user); // Only shows { name, email, image }
}

The problem is: I don't get the oid (user ID from Microsoft) in the session object

I've tried to inspect the session.user, but oid is not included, no id field either, I need the oid field to store a unique identifier in my database (as the user ID). I also tried adding a custom profile() method in the provider config to include the oid, but when I do that, I lose the image (user picture) from the session, which is weird, and i can't even access id either.

// auth.ts
import NextAuth from "next-auth";
import MicrosoftEntraID from "next-auth/providers/microsoft-entra-id";

export const { handlers, auth, signIn, signOut } = NextAuth({
  providers: [
    MicrosoftEntraID({
      clientId: process.env.AUTH_MICROSOFT_ENTRA_ID_ID,
      clientSecret: process.env.AUTH_MICROSOFT_ENTRA_ID_SECRET,
      issuer: process.env.AUTH_MICROSOFT_ENTRA_ID_ISSUER,
      profile(profile) {
        return {
          id: profile.oid,
          name: profile.name,
          email: profile.email,
        };
      },
    }),
  ],
});

I still don't see the id in session.user So how can I properly include the Microsoft Entra oid in the session without losing the default user fields like image

Thanks in advance for your help 🙏