Navigate to Exchange Online → Mailbox Reports in the left pane.
Unlike Microsoft 365 Admin Center, M365 Manager Plus reports on all types of mailboxes from a single window. Some of the reports include,Īpart from the aforementioned reports, the tool also provides reports that provide every day mailbox usage statistics. M365 Manager Plus has a dedicated set of reports to gain insights on mailbox usage. To view the actual user mailbox size, shared mailbox size, resource mailbox usage, and other mailbox related details you have to navigate to the Exchange Admin Center (EAC).
The Mailbox Usage report provided by the Admin Center shows only the storage space consumed by user mailboxes. ( Microsoft 365 Admin Center → Reports → Usage → Select a report → Exchange → Mailbox Usage) The default size of a user mailbox is either 50 GB or 100 GB, and when the space is exhausted, users won't be able to send or receive emails. To avoid this, admins need to keep a check on the mailbox size.įor this purpose, Microsoft 365 Admin Center provides Mailbox Usage report. The default size of Microsoft 365 mailboxes varies based on the mailbox type and user subscription.
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