Kaspersky Security for Microsoft Office 365 can save backup items to disk as original messages.
Saving items from Backup to disk may cause harm to your computer because they may contain viruses and other malicious objects, thus posing a threat of infection.
To save a backup item to disk:
Open the Kaspersky Security for Microsoft Office 365 Management Console.
In the left part of the page, select the Backup section.
In the table listing backup items, select the check box next to the item that you want to save.
In the upper part of the section, click the Save to disk button.