Hi, when we receive internal mails via our exchange server from other active directory domain users (but in different exchange address lists), there appears a question mark in front of their name. Also when I reply to that email, outlook for mac tells me that the address is invalid. So I have to change the recipients address manually and send the e-mail.
The same behavior happens in Apple Mail (yosemite). The strange thing is that it does not happen in other versions of OSX and also not in outlook for Windows.
Anybody has an idea?