I have one user who stopped working, and after a "Re-initialize user"
from the mobilitry monitor shows sync state failed.

Tried running gwcheck on that user and removing readding user to
mobility server with no improvement.

I see this in default.pipeline1.mobility-AppInterface.log:

2011-09-09 11:10:31.365 INFO [CP WSGIServer Thread-20]
[DeviceInterface:425] [userID:] [eventID:] [objectID:] [Server]
Connection Blocked - user "<userdn>" initial sync failed.

User can connect with groupwise client and events seems to reach the
mobility server fine.

Any ideas?