How would I integrate this at work with plain old window AD? Any tips what to start looking at?

[punkouter24]

Is your feature request related to a problem? Please describe.
A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]

Describe the solution you'd like
A clear and concise description of what you want to happen.

Describe alternatives you've considered
A clear and concise description of any alternative solutions or features you've considered.

Additional context
Add any other context or screenshots about the feature request here.

[chrpai]

I've not used blazor starter kit but here's some general knowledge I have.

IIS Hosted - ASP.NET Core apps hosted on IIS with Windows Auth turned on will automatically have the identity of the user in the requst. From there it's simple to implement RBAC with a claim filter.

Cloud/Linux Hosted - We have multiple options available to us at my day job. Entra ID and Ping Federation are the two preferred. You'd have to find out what identity providers are available to you from the people who handle IAM within your organization.