Access SharePoint Online without login

In our organization we want some internal users to be able to access our SharePoint Sites (SharePoint Online) without logging into SharePoint. Is that possible?

I read about "External User." But I believe even external users need a login.

https://support.office.com/en-us/article/Manage-external-sharing-for-your-SharePoint-Online-environment-c8a462eb-0723-4b0b-8d0a-70feafe4be85

Thanks so much!

Mayank