JAEN

Microsoft 365

Get-MailboxStatistics

SafeMailbox size

Get-MailboxStatistics <user> | fl TotalItemSize,ItemCount

Shows mailbox size and item count — the first check when 'can't receive mail' means quota.

Examples

  • Get-Mailbox -ResultSize Unlimited | Get-MailboxStatistics | sort TotalItemSize -desc | select -First 10 DisplayName,TotalItemSizeTop 10 largest mailboxes

Syntax

Get-MailboxStatistics <identity> [| fl TotalItemSize]

Before you run it

Read only.

Used when you see

Mailbox over quota
1
Check mailbox size and item count
See the whole flow →

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