Solved: Display issues with umlauts
Disrupted – Resolved after 42d 16h 47m
RESOLVED 20 March 2026: The issue was fixed with the Outlook updates from March 10, 2026. Update Outlook to one of the versions listed below. If you have a device managed by HM IT, this update will be installed automatically.
- Version 2601 19628.20252
- Version 2602 19725.20164
- Version 2603 19822.20032
UPDATE 15 February 2026: If you are affected by this issue, Microsoft recommends the following steps as a temporary workaround.
- In Outlook, go to File > Options > Advanced.
- Under International options, disable the option “Automatically select encoding for outgoing messages.”
ORIGINAL NOTICE Currently, some users may experience that umlauts (ä, ö, ü, ß) are not displayed correctly in Outlook emails and instead appear as question marks (?). This can occur in both sent and received emails.
Microsoft is aware of the issue and is working on it. https://support.microsoft.com/en-au/topic/classic-outlook-replaces-accented-and-extended-characters-with-question-marks-c1fdb067-38ca-464a-bcb1-bd657a85e1d3