Microsoft Exchange Server 2013: Mailbox and High Availability

Groups

It’s almost guaranteed that every Exchange organization includes lots of distribution groups, and the largest deployments usually include tens of thousands of groups. It is certainly useful to be able to address many recipients through one common address. However, distribution groups are seldom managed as well as mailboxes and tend to linger on in the directory long after they have ceased to be used. I worked at Hewlett-Packard until 2010, and even then, I could find groups called Windows 2000 Launch Team and Windows NT Forum in the Global Address List (GAL), both of which were artifacts of work long done.

Microsoft Windows supports four types of groups. Exchange really uses only two of these: universal groups and dynamic or query-based ...