The business does not want to lose any of its data, whether essential or not.  To keep data safe and secure, lookout for these pointers:

• Users may move older data to an archive folder outside of the Outlook OST file which will be lost in the event of data loss (application crashes, malware/virus attacks, physical damage, stolen device, Ransomware or user mismanagement).
• Create Manual backup when you archive data. 
  
• If users delete emails, they are deleted for good.