Outlook today displays task/messages but not calendar appointments

[Mirto]

Hi everyone,
as the topic says, when i click on outlook today, i can see my
tasks/messages but not the calendar appointments (All empty under calendar
column).
the account is configured is an Exchange account.

I've tryed everything:
-repair & restore of office
-delete all the local pst files and set up the account again
-rename the OUTLWVW.DLL and repair again

If I configure another exchange account on Outlook, the appointments are
shown perfectly, therefore is not a problem of the Outlook applications,
registry or files.

Thank you!