It doesn't seem to be related to any particular file type. I don't know what software or drivers are installed, this is a file server of which I have very few privileges. The servers on my company's network are very secure. I had a vendor rep come in to service our plotter one time and he made the comment: "This is the tightest network I have ever encountered." I can't even view the registry on any server (access denied). I suspect this attribute is related to new software on the file servers that will enable anyone to retreive a file or folder from backup up to three days prior without having to submit a request to retrieve from backup. The more I think about, the attribute started appearing around the same time the new backup retrieval software appeared. By the way, here is a screenshot of where anyone can retrieve a backup. It is part of the Properties dialog box of a file or folder.