Encryption of data at rest is important for sensitive information because of the following:
Facilitates tier 2 support, by preventing users from changing the OS
Renders the recovery of data harder in the event of user password loss
Allows the remote removal of data following eDiscovery requests
Prevents data from being accessed following theft of physical equipment
Data encryption allows data that has been stolen to remain out of the eyes of the intruders who took it as long
as they do not have the proper passwords.