I have several different copiers in house. Three Canon's and a MInolta. All of them at once decided to act up and stopped sending documents via scanning. The Canons now take about 2 minutes to get through and the Minolta quit entirely and just fails. I have ruled out switches by routing the exchange server and copy machine to the same switch, tried two of them. It has to be something on the exchange server blocking this or holding this up. Has anyone heard of anything like this?