CmdID / PowerShell / Cmdlets / New
New-MailboxFolder
Use the New-MailboxFolder cmdlet to create folders in your own mailbox or in other mailboxes when you have the required permissions. Exchange PowerShell reference
From the Exchange PowerShell reference 5 parameters Its page in the reference
Parameters
-NameThe Name parameter specifies the name of the new folder.-ParentThe Parent parameter specifies where to create the new mailbox folder.-Confirm, -cfThe Confirm switch specifies whether to show or hide the confirmation prompt.-DomainControllerThe DomainController parameter specifies the domain controller that's used by this cmdlet to read data from or write data to Active Directory.-WhatIf, -wiThe WhatIf switch shows what the command does without making any changes.