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AutoCAD LT? What version?
Sign in to your Autodesk Account and click on the "Seat Usage" link.
It won't tell you WHO (user or host) is using it, but it will give you a summary.
Other than that, I think you'll need a 3rd party product.
The only related thing off the top of my head is, to use the TIME command to see how much time a given drawing has been open.
Thanks, i think is only way. One person mentioned a time option where you might be able to see how long a drawing is open but i have not found it.
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