Inability with CORE license to deploy+auth to Workspace Domain?

[Xepoch]

I have a Workspace domain, in which all users have Core licenses. I as a developer of this app have a core license. I want to simply allow the app to only be used by users in the domain. Every other user in my domain despite configuration receives Access Denied:

My App config includes setting up an auth domain in Integrations. This doesn’t seem to have been a requirement in the past? Despite being a Workspace account, the Auth Domain lists as “google_cloud_identity-1” (which I find odd)?

I set Require sign-in, but all other users still get access denied:

The only other thing I could do would be Domain Auth, but this (apparently) requires Enterprise plan. This doesn’t make sense to me as the CORE license should be all that is required to restrict said internal app to my Workspace domain, correct?

What am I missing?

[Harish-Kamal]

@Xepoch , Domain Authentication is an Enterprise feature. As per my knowledge, for users with Core license, you’ll have to individually share the app with each individual user in the domain, explained in the link below.

https://support.google.com/appsheet/answer/10104983?hl=en

I am on core license, and I ended up just doing that.

[MultiTech]

Instead of going the route of using an authentication domain, which will require Enterprise license, you can share the app with your domain itself.

Inside the share settings, if you don’t include the email address, but you include the domain, you can add the entire domain to have access.

It does not require a domain authentication, this is just part of the share settings.