Sorry, I forgot to mention that in this moment I _have_ to use ZCS connector version 5.0.2683.13
So, this what happened:
- we had to move zdb files to a storage, because of lack of space on the disk
- a workmate provided the operations to move zdb files and reconfigured Outlook
- BBs stops to sync and Outlook crashed
- we uninstalled the connector, outlook, bes manager and mapi libs, then installed them again
- we had set HKEY_CURRENT_USER\SOFTWARE\Zimbra\turnOffInboxFail to 1, but users still received mails with "Server Failure Notice" subject
- we tried to remove user from BES Manager and then readd them and the problem disappeared.
Sorry if I have mistaken the thread!