Outlook fails to send mails with international/extended characters – Misslyckad klientåtgärd

After an unknown update to my main Windows environment, this error message appeared when I tried to send some emails:


Why, yes… its in Swedish. It mentions that an operation failed… And asks if the information was helpful.

Not really, some more details as to what failed and what to do about it would have been more helpful.

After scratching my head a bit I figured that it was because the name of the recipient had an extended or international character in their name.

So… my address-book is full of proper names, with é’s and åäö’s etc. in them.

Now Outlook can’t send emails to them and the only available workaround at the moment is to remove the offending characters from the name… welcome back to 1996 😐

Can anyone tell me what’s going on and how to get operations back to normal again?

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