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# Microsoft Outlook sends login data to its servers
- URL: https://www.nupath.eu/microsoft-outlook-sends-login-data-to-its-servers/
- Published: 2026-08-16T05:12:10.000Z
- Updated: 2026-08-16T05:12:10.000Z
- Author: Christian Triantafillou Schade
- Tags: News, #source_www.heise.de

Microsoft's new Outlook client transmits user login credentials to its servers, raising concerns over digital sovereignty and email privacy. The free application replaces the classic Outlook in Windows and is flagged in mailcow's documentation as a privacy risk for users prioritising data localisation. **(HEISE)**

[Microsoft lays hands on login data: Beware of the new OutlookThe free new Outlook replaces Mail in Windows, and later also the classic Outlook. It sends secret credentials to Microsoft servers.![](https://www.google.com/s2/favicons?domain=https://www.heise.de/en/news/Microsoft-lays-hands-on-login-data-Beware-of-the-new-Outlook-9608798.html&sz=64)www.heise.de![](https://heise.cloudimg.io/bound/1200x1200/q85.png-lossy-85.webp-lossy-85.foil1/_www-heise-de_/imgs/18/4/3/3/1/6/5/5/shutterstock_2108335628-6216df12420aae70.jpg)](https://www.heise.de/en/news/Microsoft-lays-hands-on-login-data-Beware-of-the-new-Outlook-9608798.html?ref=nupath.eu)