Since a few month we have a few single users, where contacts are not synced anymore.

The logfile:

I 11:53:13.864 63b2e6 FrmSvr ----- Kontakte ----- [USERNAME]
E 11:53:13.864 63b2e6 FrmSvr ..\CEOutlookTranslator\PFolder1.cpp 292 [USERNAME]
E 11:53:13.864 63b2e6 FrmSvr Fehler bei Aktualisieren eines Eintrags. [USERNAME]
E 11:53:13.864 63b2e6 FrmSvr COM-Fehler*8004006e. [USERNAME]
E 11:53:13.864 63b2e6 FrmSvr Eintragschlüssel -2147482580 [USERNAME]
E 11:53:13.864 63b2e6 FrmSvr ..\CEOutlookTranslator\PFolder.cpp 4424 [USERNAME]
E 11:53:13.864 63b2e6 FrmSvr Fehler bei Durchführung von Kontakte Ãnderungen, verarbeitete Ãnderungen = 0 [USERNAME]
E 11:53:13.864 63b2e6 FrmSvr COM-Fehler*8004006e. [USERNAME]

A temporary solution is to activate the option "Overwrite Contacts with server information" on the device and sync manually.

But the problem recures after a few days.

Thanks for any suggestions.