Mail Store storage quota must be limited.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
EXCH-MB-401	EXCH-MB-401	EXCH-MB-401_rule		Low

Description

Mail quota settings control the maximum sizes of a user's mailbox and the system's response if these limits are exceeded. Mailbox data that is not monitored against a quota increases the risk of mail loss due to filled disk space, which can also render the system unavailable. There are multiple controls, which supply graduated levels of opportunity to respond before risking data loss. This control prohibits the user from sending an email when the mailbox limit reaches the prohibit send quota value. Note: Best practice for this setting is to prohibit the user from sending email when the mailbox reaches 90 percent of capacity.

STIG	Date
Microsoft Exchange 2010 Mailbox Server Role	2012-05-31

Details

Check Text ( C-_chk )
Obtain the Email Domain Security Plan (EDSP) and locate the value for "Prohibit Send Quota Limit". Open the Exchange Management Shell and enter the following command. Get-MailboxDatabase | Select Name, Identity, ProhibitSendQuota If the value of "ProhibitSendQuota" is not set to the sites "ProhibitSendQuotaLimit", this is a finding.

Fix Text (F-_fix)
Open the Exchange Management Shell and enter the following command. Set-MailboxDatabase <'MailboxDatabaseName'> -ProhibitSendQuota <'SitesProhibitSendQuotaLimit'>