Which version of Exchange Server features the EAC?

The Exchange Admin Center (EAC) was introduced starting with Exchange Server 2013. It replaced the older Exchange Management Console and is a web-based management interface that provides a more user-friendly experience for administrators managing Exchange environments. The EAC includes a variety of features that simplify administrative tasks, such as managing users, configuring servers, and monitoring the overall health of the Exchange environment.

Subsequent versions of Exchange, including Exchange Server 2016 and Exchange Server 2019, continue to support and build upon the features of the EAC, but the initial introduction of this management console occurred in Exchange Server 2013. Thus, this version is recognized for launching the EAC, making it the correct choice.