On Monday, August 1, 2022 the login for Office 365 (e.g. Teams, office.com) will be changed to eMatriculationnumber@student.tuwien.ac.at.
Name addresses such as firstname.lastname@student.tuwien.ac.at will then no longer be valid as login names.
As before, the network account password must be used as the password.

For student employees (dual role) applies:

Consider whether you are logging in as a student or as an employee.
Students: eMatriculationnumber@student.tuwien.ac.at and network account password
Employees: Generic email address and upTUdate password.

Other logins such as the TUaccount (TISS and TUWEL login) remain unchanged and are not affected by this change.

There is nothing to be done actively from your side, this conversion happens system-wise.