# 3.3.2 Identifying Users

Zoom users are also identified by email address. Emails (unlike names) are unique, and they sometimes represent people better than the legal name held in a company’s HR system. Most users already have email addresses they are associated with, such as the one they use to log in. Zoom Mail Service (see Section 6) also issues users a dedicated email address upon signup for Zoom Mail Service users; this email address acts as identification will be their Zoom Mail Service address. We may support associating multiple email addresses per user in the future.

In some cases, users will be able to change the email associated with themselves. When a user Alice changes their email from *<support@example.com>* to *<alice@example.com>*, for example, other users that interact with Alice are not notified of this change. However, if a new user Bob takes over Alice’s old email *<support@example.com>* and associates it with his existing user, then people who interacted with *<support@example.com>* when it was associated with Alice will get a prompt explaining that *<support@example.com>* is now associated with a new user. These notifications are supported by the Contact Sync feature (planned for a future release; see Section 3.9).
