When copying (including structure copying) tasks, appointments, phone calls and memos, not all data is copied 1: 1, but the following fields are reset to their default values:
Status, Responsible, Creator, Delegate, Delegate to, Monitoring, Notification, Start, End, Status Comment, Release Level, Series, Reminder, Synchronization Fields, and some internal data.
Activities that are completed, accepted or refused will be delegated when copied. If such an activity is copied, its status is set to Delegated, and as the delegating person (Additional data) the current user is entered, if she or he is not the person responsible.