Take a look at Audit table. It has at the very least user access data. If auditing is enabled for some entities in your instance, Audit table will have that data as well. Here's an excellent breakdown of the Audit table: Audit Table Details
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Hi JanetHave a view at the Xrm Toolbox "User Audit Viewer". It's free and does exactly what you need.
By the way, Xrm Toolbox has some other great tools too.
If you've found this thread useful, dive deeper into User Group community content by role