Azure Active Directory is not Active Directory!
Azure Active Directory is not Active Directory! If you’ve been working with Azure for a while you likely already know this, but this topic is something I see over and over again with people who are getting started with Azure. Azure Active Directory is not a cloud version of Active Directory, and in fact, it bears minimal resemblance to its on-premises namesake at all.
The question I see over and over again with people new to Azure, I even answered this question just this week, is “how do I join my servers to Azure AD?