There are a few ways to provision users in a Microsoft Azure AD directory. The most common is with the use of the Azure AD Connect tool which syncs your on-premises AD directory with Azure AD. The simplest way (and good for Cloud Only scenarios) is to create users directly in Azure AD. If you want to create a user in Azure AD with the UPN of your domain name, you first need to validate the domain name. In this blog I will show you step-by-step how to do this.