I've just taken over a Service Desk using the ME product, something I have limited knowledge of.

We have a database of approximately 90,000 users, which is far more than the number of clients we support, I would say around double.

I am looking for a way to clear out all the "dead wood" and have run a report of current users, which has a maximum of 50,000 results.

How can I run a report that shows when the users last logged a ticket?

If I can get this information, I can just investigate and then potentially delete old / duplicate records.