When was the Exchange Admin Center (EAC) introduced?

The Exchange Admin Center (EAC) was introduced with Microsoft Exchange Server 2013. This interface was designed to provide a more user-friendly and intuitive way to manage Exchange Server environments compared to the older Exchange Management Console. The EAC brought a web-based management experience to administrators, allowing them to perform tasks related to mailboxes, compliance, and other Exchange functions more efficiently in a centralized setting. The introduction of EAC was part of Microsoft's efforts to modernize its administrative tools, aligning with the broader shift towards web-based administration solutions in the industry.