Current Message

Information from 13.02.2025

Warning against using the new app „new outlook“

The 'new Outlook' is a new app that has been available since August 2024 and differs from the Outlook version installed via Microsoft Office. The classic and new Outlook can currently be used in parallel, but Microsoft is planning to introduce the 'new Outlook' in the long term as the successor to the previous Outlook.

The critical point here is that the “new Outlook” synchronizes both mail content and access data with the Microsoft cloud. The Outlook apps for Android and IOS show similar behavior (see warning on the ITMC website from 22.11.2023).

This also applies to MacOS users if they download and install the “new Outlook” for MacOS free of charge from the Mac App Store. If you have such a need, use Office 2021, which is covered by the campus license and includes Outlook.

Due to this security risk, the use of the “new Outlook” is not permitted for business email accounts at TU Dortmund University until further notice. We also strongly advise against using the Outlook apps for iOS and Android.

Please note that the apps must be uninstalled once they have been set up. It is also necessary to change the TU password so that Microsoft loses access to the mail account.

Since 07.02.2025, a central setting prevents the installation of the “new Outlook” on workstations and laptops that are centrally managed by the ITMC. If Windows 11 was previously installed with “new Outlook”, the app must be uninstalled manually. If you need assistance with this, please contact the .

Your Chief Information Security Officers
Ralf Offele & Ebru Ernesti (deputy)