Microsoft team has recently published a design and architecture guide for Securing Azure environments with Azure Active Directory, this is an essential guide for all Organization adopting Microsoft Azure.
You can review Access here for more details and download the guide : Securing Azure environments with Azure Active Directory
You can review Access here for more details and download the guide : Securing Azure environments with Azure Active Directory
In addition to this, if you are new and want to know more about Azure Active Directory you can download the below Crash course e-book.
Download here: Crash course in Azure Active Directory