Since we upgraded our Exchange 2007 Servers to SP1, we have a problem with display name conversions performed by Exchange. Sender names in outgoing emails are encoded according to RFC2047 which is correct but if emails are accessed through imap or pop clients or simply sent to outside recipients, the sender appears as two different senders with malformed names and email addresses. People can't reply to such messages because one of the two resulting recipients is incorrect.
There was a problem with this encoding that's described in KB942647. The encoding is supposed to be correct now but clients other than Outlook can't handle it. Currently the sender names are encoded like this:
From: =?iso-8859-1?Q?J=FCrgen=2C
_M=FCller?
= <xxx@xxx.xxx>
This resolves to: Jürgen, Müller <xxx@xxx.xxx>
It should be: "Jürgen, Müller" <xxx@xxx.xxx>
Note the missing quotes. This is correct according to RFC2047 but as I said before, clients other than Outlook can't handle it. And we have lots of Macs with Entourage and Apple Mail connecting to our Exchange. Thunderbird aso doesn't work. If there were quotes around the names, everything would be perfect. Setting them in AD is not an option since this would brake search and sorting in the public address book.
The same problem appeared before in Exchange 2003. According to KB886757 there was a registry key that would set Exchange back to non-RFC2047 behaviour and thus letting imap clients work like usual. Is there anything I can do in Exchange 2007 to set it back to pre-SP1 behaviour? Or to let it set the quotes around sender names?
Quick help is appreciated since this is a main issue for our organisation.
Thanks!
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