STIGQter: STIG Summary: Microsoft Exchange 2019 Mailbox Server Security Technical Implementation Guide Version: 2 Release: 3 Benchmark Date: 02 Jul 2025:

Exchange mailboxes must be retained until backups are complete.

DISA Rule

SV-259671r961128_rule

Vulnerability Number

V-259671

Group Title

SRG-APP-000231

Rule Version

EX19-MB-000115

Severity

CAT II

CCI(s)

• CCI-001199 - Protects the confidentiality and/or integrity of organization-defined information at rest.

Weight

10

Fix Recommendation

Open the Exchange Management Shell and enter the following command:

Set-MailboxDatabase -Identity <'IdentityName'> -RetainDeletedItemsUntilBackup $true

Note: The <IdentityName> value must be in quotes.

Check Contents

Open the Exchange Management Shell and enter the following command:

Get-MailboxDatabase| Select-Object -Property Name, Identity, RetainDeletedItemsUntilBackup

If the value of "RetainDeletedItemsUntilBackup" is not set to "True", this is a finding.

Vulnerability Number

V-259671

Documentable

False

Rule Version

EX19-MB-000115

Severity Override Guidance

Open the Exchange Management Shell and enter the following command:

Get-MailboxDatabase| Select-Object -Property Name, Identity, RetainDeletedItemsUntilBackup

If the value of "RetainDeletedItemsUntilBackup" is not set to "True", this is a finding.

Check Content Reference

M

Target Key

5580