In the Web Client there is a Trash folder under Mail and Addressbook but none under Tasks, Calendar or Documents.
If you delete a mail message, you can see it under the Mail Trash but not under Addressbook Trash.
If you delete a contact, you can see it under Addressbook Trash but not Mail Trash.
If you empty Trash then it empties both Mail and Addressbook Trash.
If you delete a Task or Calendar entry there is no second chance, it just disappears because there is no Trash folder for them.
In Outlook there is only one Trash folder and it contains all items you deleted.
Can the Web Client be fixed and make it work like the Outlook Trash folder?