Archive change logging and notification setup can do that show who logged in and what they did without any software below links show examples of how to setup and what it shows , or else you could use Cisco prime software as an example but you will need a license for 2000 switches
http://itknowledgeexchange.techtarget.com/cisco/tracking-configuration-changes-with-the-cisco-ios-built-in-using-the-archive-command/
http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/config-mgmt/configuration/xe-3s/config-mgmt-xe-3s-book/cm-config-logger.html