If a larger office printer/copier, most of them come with a hard drive. So if there's no way to access it from the touch panel on the machine itself, then just pull it and connect it to another machine with an adapter. Then take a looksee. Not only can you see the dates of when things were printed, you can most often grab a copy of the exact file. Copies can be accessed the same way, since they make a copy of the scan and then print it.
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