Get-MailboxDatabase -Status | Select Servername, Name, AvailableNewMailboxSpace, DatabaseSize
Get-PublicFolderDatabase -Status | Select Servername, Name, AvailableNewMailboxSpace, DatabaseSize
Get-Mailbox -resultsize unlimited | Get-MailboxStatistics | sort -property totalitemsize -descending | ft displayname, totalitemsize, lastlogontime

Get-mailbox -resultsize unlimited | Get-MailboxStatistics | sort -property totalitemsize -descending | Select-Object displayname, @{expression={$_.totalitemsize.value.ToGB()};label="Size(GB)"} | Export-csv c:\temp\MailboxInfo.csv

Get-PublicFolder -Server ServerName "\Non_Ipm_Subtree" -Recurse -ResultSize:Unlimited | Remove-PublicFolder -Server Servername -Recurse -ErrorAction:SilentlyContinue
Get-PublicFolder -Server ServerName "\" -Recurse -ResultSize:Unlimited | Remove-PublicFolder -Recurse -ErrorAction:SilentlyContinue