From June 20 at 09 you must use two-factor authentication (secure login) for Microsoft 365 (Word, OneDrive, Teams etc.) and Feide (Canvas, My Studies etc.) at UiO.
From then on, you must confirm your login with a mobile phone. You can and should already now prepare for two-factor authentication, but you will not be required to do two-factor authentication before the first login after 20 June at 09.00.