Student and alumni (Dukes) Microsoft 365 accounts formerly existed in a separate environment from employee (JMU) accounts.  As Microsoft 365 matured, the separation limited to our ability to use Teams, share files, and more.  As a result, Information Technology migrated Dukes accounts into the same environment as JMU accounts.  The migration did not change student/alumni email addresses (they remain @dukes.jmu.edu), but it removed barriers to communication and collaboration between all accounts at JMU.  IT extensively planned and prepared for this migration (sometimes referred to as the "tenant merge") to make it as smooth as possible.