Export Office 365 Mailbox Size Report Using PowerShell

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…