MSc students have a number of options they can choose from when considering how to structure their 3rd semester. These options include electives offered at AU, electives at another relevant Danish institution, exchange to a university in another country, summer schools and internships.
The links below may be helpful when considering your 3rd semester activities:
Guidelines for internships for students of economics and business administration
Electives at the Department of Management
A list of all electives offered at MGMT