Hi all,
I have some very strange issues after migration.
When I migrate all domains and accounts from old to new server,
I did test to sent and received messages and server work perfect, but:
1) Email client did not sync anything with server. To fix that I should remove account from Outlook and add it again. Unfortunately I have more then 1000 users and it is impossible to do this procedure to every one.
2) When I try to sync mobile phone with zimbra server, I did the same procedure like re-add account on phone, but not all messages was synced.
Test with Android devices: messages which was sync was after 20 of april and before 6 of march.
Test with Windows devices: all is work like a charm
With old server I did not have this problems.
Will be nice if someone can help me. 
Additional information:
Old Zimbra server - Release 8.0.7.GA.6021.UBUNTU10.64 UBUNTU10_64 FOSS edition, Patch 8.0.7_P1.
New Zimbra server - Release 8.6.0_GA_1153.RHEL7_64_20141215151110 RHEL7_64 FOSS edition.