Title

Mailbox Stores Restore Overwrite is enabled. (Cat III impact)

Discussion

E-mail system availability depends in part on best practices strategies for setting tuning configurations. Unauthorized or accidental restoration of mailbox data risks data loss or corruption. This setting controls whether the mailbox store can be overwritten by a backup, which will cause loss of all information added after the backup was created. It should only be enabled during maintenance windows or following an outage (immediately before a restore is to be made), and cleared again immediately afterwards. During production windows, this setting must be disabled.

Check Content

Ensure that Mail Stores Restore Overwrite is enabled. Procedure: Exchange System manager >>Administrative Groups >> [administrative group] >> servers >> [server name]>> [storage group] >> Mailbox store [server name] >> properties >> database tab The “This database can be overwritten by a restore” checkbox should be cleared. Criteria: If “This database can be overwritten by a restore” checkbox is cleared, this is not a finding.

Fix Text

Ensure that Mail Store Restore Overwrite Protection is enabled. Procedure: Exchange System manager >>Administrative Groups >> [administrative group] >> servers >> [server name]>> [storage group] >> Mailbox store [server name] >> properties >> database tab Clear the “This database can be overwritten by a restore” checkbox.

Additional Identifiers

Rule ID: SV-20393r1_rule

Vulnerability ID: V-18725

Group Title:

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.