You can check both individual email account and whole domain email account quota. However, admin password is required to check all e-mail accounts' quota under the same domain due to security enhancement. It is a real time quota report.

Individual Email Account Quota

Example:
Email Address:	mymail@abc.com

Email Address:

Whole Domain Email Account Quota

Example:
Domain Name:	abc.com
Postmaster Password :	12345678

Domain Name: Postmaster Password: