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

Exchange mailbox stores must mount at startup.

DISA Rule

SV-259674r961152_rule

Vulnerability Number

V-259674

Group Title

SRG-APP-000246

Rule Version

EX19-MB-000121

Severity

CAT III

CCI(s)

• CCI-001094 - Restrict the ability of individuals to launch organization-defined denial of service attacks against other systems.

Weight

10

Fix Recommendation

Open the Exchange Management Shell and enter the following command:

Set-MailboxDatabase -Identity <'IdentityName'> -MountAtStartup $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, MountAtStartup

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

Vulnerability Number

V-259674

Documentable

False

Rule Version

EX19-MB-000121

Severity Override Guidance

Open the Exchange Management Shell and enter the following command:

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

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

Check Content Reference

M

Target Key

5580