Issue: you need to create a new mailbox database on Exchange 2007/2010/2013/2016 and above
Solution: Use the New-MailboxDatabase command from Exchange Management Shell to create new mailbox databases. For example:
New-MailboxDatabase -Server <Your Mailbox Server Name> -Name “Mailbox Database 01” -EdbFilePath “M:\ExchangeDB\Mailbox Database 01\Mailbox Database 01.edb” -logFolderPath “L:\ExchangeDB\Mailbox Database 01”
Note: you’ll need to edit the mailbox database name and path in the example to reflect your database and log path and desired mailbox database name
This article applies to Exchange 2007, Exchange 2010, Exchange 2013, Exchange 2016 and above.