Logging of account-related activities

Hello all,

people may modify their accounts and that of others, for example:

  • users can change their user name or email-adress
  • admins can assign a role to a user, for instance give admin/modeartor/manager rights to someone and withdraw the right later

I think it could be helpful e.g. in case of disputes, to have these kind of activities documented, at least on the server.

Is there such logging of user account-related activity?
If yes, where to find the information?

Thanks in advance!