We have recently migrated from Exchange 2003 to Exchange 2010 and since this time we have had a weird issue where chinese characters in the displayname for an emailadres get replaced by question marks. I've tried to research the problem but I've not been
able to find an exact match to the problem we are experiencing:

When replying in OWA it works fine, characters stay in place in sent items and on the email the recipient getsWhen replying in OLK 2007 / 2010 cached mode it works fine, no missing charactersWhen replying in OLK 2007 / 2010 Online mode it starts to go wrong, the chinese characters in the displayname are replaced by question marksReceiving email is no problem, in the inbox the displayname is always correct
Chinese characters in the body of the email seem to stay put (but we dont speak chinese, so the body tends to be in english). If you save the recipient as a contact, outlook also displays the question marks in the displayname on the contactsheet, but also
only when in online mode. In cached mode the contact sheet displayname shows the correct characters.
I can use a properly formatted contact to send email and the displayname will stay correct, both in online and cached mode. However, copy/pasting the email + displayname will not work. Judging from the items in the sent mail folder, we have started to experience
this since we migrated, older emails are shown with the correct formatting. Sadly I cant confirm this because the Ex2k3 server has been removed already.
I have however tried this in another (unrelated) Ex2k10 environment with OLK2010 and the same thing happens there, so it doesnt seem to be unique to our site.
It's not a huge problem since email is going out and being received, but I'd prefer to solve it because it doesnt look very professional towards our supplier. Anyone got an idea how we can resolve this?
Thanks,
Andr

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Hi
1. Do you try access email by owa ?
2. You have done exchange migration. Can you modify display name and test it again. (chinese characters->english name->same chinese characters)?Terence Yu
TechNet Community Support

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The recipient with the chinese characters in his displayname is an external recipient for us. I've been able to recreate and test this by using a test hotmail (and gmail) account where I just put in some (random) chinese characters as displayname. The behaviour
in that case is exactly the same as I stated.
If I send email to an external recipient with chinese characters in his displayname from OWA that works fine, as well as when I use outlook (2007 and 2010) in cached mode. It's just online mode outlook that doesnt seem to work. Like stated before I can reproduce
this in two seperate (and unrelated) exchange 2010 environments.

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