Mail does not synchronise but calendar syncs normally.
The error is found on about 10% of the users and these users are advanced e-mailusers. They have huge mailboxes.

I found this document on Novell support pages.

ERROR: "Unexpected failure detected: NestedException"

In this document they mention the Root Cause:
GMS unable to write to the user database due to space issue or user quota

We have no restrictions on mailbox sizes. Is there any other size restrictions per user that may cause this error.

GW 703 hp1
GMS 203 linux