Exchange 2013 Move public folder mailbox to different mailbox database
New-MoveRequest -Identity “pfmailbox” -TargetDatabase PFDATA
Get-MoveRequest -Identity “pfmailbox”
Get-MoveRequestStatistics -Identity pfmailbox | Format-List Status
Get-MoveRequest -MoveStatus Completed | Remove-MoveRequest
Mor:
https://technet.microsoft.com/en-us/library/jj906434(v=exchg.150).aspx