[Update 14-Jan-2026] The issue was solved with the last Google update.
[Update 08-Dec-2025] Please set up the account again in the Gmail app if it is not working anymore:
https://faq.tickets.tu-dresden.de/v/ItemID=543
Pay particular attention to point 4, ‘Security type: SSL/TLS (accept all certificates)’.
Due to the current Gmail app update, it is currently not possible to retrieve TUD emails or synchronize calendars. This has been deactivated by Google.
In the meantime, please use the link https://msx.tu-dresden.de For some Android versions, removing and re-adding the account in the Gmail app helps, as described in the instructions: https://faq.tickets.tu-dresden.de/v/ItemID=543