I encountered a strange case and would like to see anyone experienced before.
I am using Samsung Galaxy SIII - Android version 4.1.2 and using ActiveSync with Zimbra version 7.0. When I reply a email, the original message was trimmed and the receipient can only see text that I just reply. But I tried to connect to Exchange for test, and it has no problem.
Moreover, when I reply or new a email, it just show the username part of the email address as the sender name (For example my email is firstname.lastname@example.org then it just how alex in sender). But when I tried to connect to Exchange for test, and it can show my full name configured in the zimbra correctly.