With our deployments, we always do a professional install to make sure the client has the best experience possible. Part of the procedure is to copy all of the .xml files for the welcome emails from the server, rename them to .3cxconfig, and put them on a USB stick for the tech doing the install. In v15, these files aren't there. The only way to do this in v15 is to change the email address to the the tech, send the email, save the attachment, and then change the email address back to what it should be. This is very labor intensive and greatly increases the risk of an error in the email address being wrong. Please bring back this ability.