After upgrade Zarafa 7.2.6 -> KSC [warning] K-1204: The sync ID 12085 does not exist.

Hi all,

after successful upgrading to KSC (running at Univention UCS 4.1) we see this warning

[warning] K-1204: The sync ID XXXXX does not exist. Session user name: xxxxx.yyyyyy.

logged many times in server.log. Different sync IDs, but same Session user who is still accessing via old MAPI client (latest version, cache mode because he sits at home office via WAN connected).

Should we do something or just ignore?

THX & Regards,

same issue on my system…
server.log: [warning] K-1204: The sync ID 1 does not exist. Session user name: SYSTEM.
In my case only if kopano-search is running and each warning correlates with an error in the search log:

  File "/usr/lib/python2.7/dist-packages/kopano/", line 87, in log_exc
    try: yield
  File "/usr/lib/python2.7/dist-packages/kopano_search/", line 368, in incremental_sync
    new_state = self.server.sync(importer, self.state, log=self.log)
  File "/usr/lib/python2.7/dist-packages/kopano/", line 606, in sync
    return _ics.sync(self, self.mapistore, importer, state, log or self.log, max_changes, window=window, begin=begin, end=end, stats=stats)
  File "/usr/lib/python2.7/dist-packages/kopano/", line 216, in sync
    exporter.Config(stream, flags, importer, restriction, None, None, 0)
  File "/usr/lib/python2.7/dist-packages/", line 2900, in Config
    return _MAPICore.IExchangeExportChanges_Config(self, lpStream, ulFlags, lpUnk, lpRestriction, lpIncludeProps, lpExcludeProps, ulBufferSize)
MAPIErrorDiskError: MAPI error 80040116 (MAPI_E_DISK_ERROR)

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