Hi Brian,
Thank you for the feedback. Off the top of my head, I don't know of any reason why the "Last Authenticated IP" can't be included on the All tab as well. I will escalate this request on your behalf.
For now though, when you click on the user's row or right-click > View Authenticated IPs, you can open a modal that shows ALL authenticated IPs and their last login times. The most recently used IPs will be at the top.
Andrea Free
SmarterTools Inc.
877-357-6278
www.smartertools.com