When you delete a document from a database (say mail box) and refresh the database, a document's marked for deletion...
The following procedure will make the marks remain in the database and not be permanently removed for a set number of hours. The hours can be set as required. After that time, the document is permanently deleted from the database. Open the database; choose File - Database - Properties; click the Advanced tab (last tab from left).
Note: For a new database: Choose File - Database - New; click the Advanced button.
Select "Allow soft deletions."
Specify a time, in hours, for undeletion to be available in the Undelete Expire Time field; click check mark to save. For example, enter 2 if you want to allow a 2 hour retrieval period for documents you have deleted before they are permanently deleted.
Choose Create - View; select "Shared, contains deleted documents" from the "View Type" box.
Name the view.
Note: Deleted documents can be seen in this view until the timer you customized deletes them permanently. You need Author access to a database to delete documents you have created, and Editor or greater access to delete documents others have created.