Has anyone know of resolutions to calendar appointments being out by an hour on various mobile handsets.

The two hansets in question are a Motorola K3 and a Sony Ericcson G502.

The timezones for both handsets have been set correctly and all the relevant time settings for OWA and Exchange have been checked.

We know it is not the user settings as the same user has tried an iPhone and got correct calendar times and others are using Nokia and Blackberry with no issues.