We have something called a DocSend. It is a computer hooked up to a copier that runs an application from EFI that lets you scan a document on the copier and email it to yourself or someone else. At first it worked fine. Now we sometimes not all the time get authentication errors. The software just tells us it is unable to authenticate. The software is trying to authenticate against our active directory. We started having trouble after we removed one of the 2 domain controllers and added a different one. I have been checking the event logs but can't find anything that looks like it would be caused by the docsend error.
Does anyone have an idea on what would cause intermitent authentication errors?