I wanted to add folder permissions to a user but it seem you can only give permission to folders one a time. Bu I wanted to add permissions to all folders at one time, is there a parameter I can use ? Here is the example of adding permissions to the in Inbox and you have repeat this for other folders. Exchange 2010
Add-MailboxFolderPermission -Identity ayla@contoso.com:\Inbox -User Ed@contoso.com -AccessRights Owner