[horde] Doubling emails-problem in Outlook 2013

[Patrick De Zordo]

Hi guys,
[#12945] ActiveSync: Deleting one email in Outlook 2013 results in two 
mails in Outlook 2013 trash folder
indicates a part oft he problem..

This is "ok" for the clients using Horde as "MS Exchange" Server..
They are not happy about it, but they can work with it..

But the bigger problem is the following behavior:
When a message is moved from the INBOX to a subfolder INBOX.test then 
also there the message is doubled..

This is more then horrible for users.. They dont know which of the 2 
messages is the "real" one..

In addition Oultook says in status line on the bottom "trying to 
connect" + triangle with exclamation mark..
Users are going to be confused and can't understand it.. you know..

Any hooks/code changes to make in my own GIT fork to workarround?

Cheers!