Both assist.com and forward from another dedicated service on exchange. The gotoassist team has acknowledged there are delivery problems when it happens. Been a year now and not fixed. They say they are working on it. Not quite up to enterprise SLA yet sold as a Citrix enterprise solution. We have to deliver copies of incoming tickets to our staff by separate email because we can't assume we will get emails from the service timely. A real pain. As you can tell I'm bugged with the roll out of the GUI glitz but no fix to the core service delivery which is painful. I think they scaled too quickly and could not handle the load.