Simple Authentication of a Blazor Web App

[Stefan75]

Hello,

I am a WPF developer and not used to ASP.NET Core. Please keep this in mind :)

Objective:
I want to develop a Blazor based Web App for my developer colleagues.

All users are part of an active directory which is also synced to Azure Active Directory aka Microsoft Entra ID
(I hope that sync is the right term).

Therefore, I don't want to have an own database with users and I don't want to have a user registration.

I want that all users of my web-side are automatically authenticated based on there normal company account and password. There are several 3rd party web-sides which are integrated in this way.

It should not be required to use a login button, I would prefer that they are directly forwarded to an interactive login (if required).
The app should be as simple as an installed desktop application :)

Example:
If I use Microsoft services, I am able to authenticate with following UI - maybe something like this:

My company has an intranet page to register Azure applications. Within this intranet page I can choose between SAML and OAuth based authentication.

I checked several .NET 8 Identity examples, but I was not able to find a solution without a fancy login UIs with a lot of features (e.g. register, login via xyz, ...). I am not sure if Identity is the right approach for me.

Can someone point me to a simple example?

Regards,
stefan