At a time when many are choosing to adopt Microsoft Office 365, OneDrive, and Exchange Online, the need to find and process (delete, absorb into the Exchange Online Archive, etc.) PST files is extremely common. The files can very large, they are most often obsolete user-created backups, and the network traffic arising from syncronization of active PST files can place significant load on connectivity.
Email archives can contain extremely sensitive information, valuable to the organization and to those who might seek to damage it. Espionage, theft, accidental or intentional disclosure; when email archives are involved, the consequences can be dramatic. Realizing and responding to these risks, many organizations have now introduced directives to cease the use of email archive files. These policies must be monitored and non-compliance flagged.