University of Tartu IT services status page - Change in Owncloud login from December 5th – Maintenance details

From December 5th, logging into the Owncloud environment will change due to the introduction of Microsoft Single Sign-On (SSO). The purpose of this update is to provide two-factor authentication (MFA) when logging into the Owncloud environment, which increases security and protects user accounts. Previously, logging in was done with a username and password, after the change, logging in will be through your Microsoft account (format: username@ut.ee).

You can find more information in the Activating two-step authentication guide.