How to understand who and when deleted an admin user from the account?
When user is created, deleted or modified, corresponding event is generated. It can be fount in the Provider's Control Panel at:
Home - System - Settings - Events - User Deleted - Event log.
The record looks like the following:
Event # Event Type User Deleted User Schedule Time 01-Jan-1970 01:00:00 Parameters UsersID=*;Login= Status Processed
The User string represents a user who did the action. The Event Registration time in the Event Log - is the time when the action has been done.