Get-MailboxFolderStatistics (ExchangePowerShell)

You need to be assigned permissions before you can run this cmdlet. Although this article lists all parameters for the cmdlet, you might not have access to some parameters if they aren't included in the permissions assigned to you. To find the permissions required to run any cmdlet or parameter in your organization, see Find the permissions required to run any Exchange cmdlet. A mailbox can have hidden items that are never visible to the user and are only used by applications. The Get-MailboxFolderStatistics cmdlet can return hidden items for the following values: FolderSize, FolderAndSubfolderSize, ItemsInFolder and ItemsInFolderAndSubfolders. The Get-MailboxFolderStatistics cmdlet shouldn't be confused with the Get-MailboxStatistics cmdlet.