STIGQter: STIG Summary: Microsoft Exchange 2016 Mailbox Server Security Technical Implementation Guide Version: 2 Release: 3 Benchmark Date: 23 Apr 2021:

Exchange Mail Quota settings must not restrict receiving mail.

DISA Rule

SV-228380r612748_rule

Vulnerability Number

V-228380

Group Title

SRG-APP-000246

Rule Version

EX16-MB-000320

Severity

CAT III

CCI(s)

• CCI-001094 - The information system restricts the ability of individuals to launch organization-defined denial of service attacks against other information systems.

Weight

10

Fix Recommendation

Update the EDSP to specify the value for the Prohibit Send Quota limit or verify that this information is documented by the organization.

Open the Exchange Management Shell and enter the following command:

Set-MailboxDatabase -Identity <'IdentityName'> -ProhibitSendQuota <'QuotaLimit'>

Note: The <IdentityName> and <QuotaLimit> values must be in single quotes.

Check Contents

Review the Email Domain Security Plan (EDSP) or document that contains this information.

Determine the value for the 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 site's Prohibit Send Quota limit, this is a finding.

Vulnerability Number

V-228380

Documentable

False

Rule Version

EX16-MB-000320

Severity Override Guidance

Review the Email Domain Security Plan (EDSP) or document that contains this information.

Determine the value for the 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 site's Prohibit Send Quota limit, this is a finding.

Check Content Reference

M

Target Key

4223

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