public EwsItem(
	ItemId id
)

Public Sub New ( 
	id As ItemId
)

This overload lets you wrap EWS Managed API's ItemId with MailBee's EwsItem object. This can be useful, for instance, if you're building the list of EwsItem object to be then passed to a method like DownloadItems(IEnumerableEwsItem, EwsItemParts) and for some reason already have your input data as ItemId objects from EWS Managed API.