Hello,
I have installed Zimbra ZCS 8.0.7 in producction . In another server I have Z- Push 2.1.2 and Zimbra Backend 59 .
I have a Samsung Galaxy S4 zpush configured with Microsoft Exchange Server ActiveSync to synchronize the calendar , contacts and email .
It's working fine a week or two and suddenly my calendar appointments began to be duplicated growing to 323 in the same day quotes, this makes calendar crash and the battery is consume.
In the log of the z -push only have over and over this line

16/5/2014 8:54:08 [ 11018 ] [INFO ] [ abarbera@savia.net ] ExportChangesDiff -> InitializeExporter (): Found '131 'changes
16/5/2014 8:54:08 [ 11018 ] [ WARN ] [ abarbera@savia.net ] Mobile loop detected! Messages sent to the mobile will be restricted to 1 items in order to identify identity the conflict
16/5/2014 8:54:31 [ 11017 ] [INFO ] [ abarbera@savia.net ] .1.2-1873 Version = '2 ' method = ' POST ' from = '213 .143.46.94 ' cmd = ' Sync' getUser = ' abarbera@savia.net ' devid = ' androidc1141671377 ' DEVTYPE = 'Android'

This happens to me and two other people in company , I have others not happens ... How can I identify the problem ?