Copy an encrypted message in outlook redemption without decrypting it

Copy an encrypted message in outlook redemption without decrypting it

I want to do the following (pseudo-code) with outlook API or outlook
redemption
var sourceMessage = Folder.Item[count];
//Check if source is encryted
if(sourceMessage is EncryptedMessageType)
{
//Created a new message on target destination, and copy encrypted bytes
var targetItem = TargetFolder.Items.Add(EncrytedMessageType)
targetItem.Body = sourceMessage.Body;
targetItem.EncryptionType = sourceMessage.EncryptionType;
targetItem.Save();
}
Is this possible?
I looked up the RDOEncryptedMessage object but all the proprieties looks
read only.