if I send an email from the Webapp webinterface to an external (internal works!) person, the sender is displayed as follow in Outlook (2013 in this case):
In Webapp itself it is displayed correctly - also if I send the email out of Outlook.
Here some version informations:
root@mail:~# kopano-server -V
Product version: 8,3,0,1042
File version: 1042