As an admin, it is an important task to periodically monitor Office 365 mailbox size and quotas. Else, it will end up in error like ‘mailbox size limit exceeded,’ ‘unable to send/receive messages due to mailbox quota,’ etc.  So, how will you check the mailbox size in Office 365? You can use either the Exchange admin center or PowerShell to get a mailbox usage report. But the Exchange … Continue reading Export Office 365 Mailbox Size Report Using PowerShell