Years back, some of you may remember, Active Directory (AD) was all the rage. I recall its release with Microsoft Windows Server 2000 and wrote entire books on the subject, everything from design to deployment to continued maintenance. Over time, it has lost its novelty as the shiny new toy, but it hasn’t lost its value as the foundation piece to all other aspects of your network and on-premises servers, like Exchange. That has held true even with its cloud-based cousin Azure AD. Nothing takes out the entire Microsoft 365 suite like an Azure AD outage because identity management and a host of other server necessities are tied back to it.