GW 8.0.2 HP3 at OES2 SP2
GW Clients at 8.0.2 HP2 and HP3 tested.

We have one user who cannot see adressbooks at his Client at Online-Mode. If he looks at webaccess his adressbooks are existing but without any entry (so it's not an error from GW-Client). If he uses caching-mailbox with client (what else?) everything is fine. All adressbooks are there with all entries. He could make a new caching-mailbox at another computer - everything is fine. He goes to online-mode and see only the system adressbook. The user uses datasync and on his phone all contacts are fine.
Anyone have an idea?