You can check your M365 mailbox quota and usage of Microsoft 365 Outlook Web App (OWA): Login your M365 account with Microsoft 365 OWA. Click “gear” icon at the top-right corner of OWA window. Select “View all Outlook settings“. Click “General“, then”Storage“. The mailbox usage will be shown. Original Information Posted at:cityu.edu.hk/csc/deptweb/support/faq/email/o365/mailbox_usage.htmRetrieved: 6/18/21
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