Gary J wrote:

The recurring Appointments or events suddenly changed from an all day
event to an 11.30pm to 11.30pm the next day showing as a 2 day
appointent/event. This has happened several times. Is there any way
to fix this rather than changing the years events individually?

You have a mismatch in the DST settings between Windows and Outlook.
Perhaps you neglected to install the 2007 DST updates for both WIndows and
Outlook.
--
Brian Tillman [MVP-Outlook]