The Exchange Mailbox database must not be overwritten by a restore.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-69995	EX13-MB-000140	SV-84617r1_rule		Low

Description
Email system availability depends in part on best practice 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 afterward. During production windows, this feature must be disabled.

Description

Email system availability depends in part on best practice 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 afterward. During production windows, this feature must be disabled.

STIG	Date
MS Exchange 2013 Mailbox Server Security Technical Implementation Guide	2019-09-25

Details

Check Text ( C-70469r1_chk )
Open the Exchange Management Shell and enter the following command: Get-MailboxDatabase\| Select Name, Identity, AllowFileRestore If the value of AllowFileRestore is not set to False, this is a finding.

Fix Text (F-76231r1_fix)
Open the Exchange Management Shell and enter the following command: Set-MailboxDatabase -Identity <'IdentityName'> -AllowFileRestore $false Note: The value must be in quotes.