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

Exchange must have forms-based authentication enabled.

DISA Rule

SV-259647r960759_rule

Vulnerability Number

V-259647

Group Title

SRG-APP-000014

Rule Version

EX19-MB-000008

Severity

CAT II

CCI(s)

• CCI-000068 - Implement cryptographic mechanisms to protect the confidentiality of remote access sessions.

Weight

10

Fix Recommendation

Open the Exchange Management Shell and enter the following command:

Set-OwaVirtualDirectory -Identity <'IdentityName'> -FormsAuthentication $false

Note: <IdentityName> must be in quotes.

Example for the Identity Name: <ServerName>\owa (Default website)

Restart the IIS service.

Check Contents

Open the Exchange Management Shell and enter the following command:

Get-OwaVirtualDirectory | Select-Object -Property ServerName, Name, Identity, *Authentication

If the value of "FormsAuthentication" is not set to "False", this is a finding.

Vulnerability Number

V-259647

Documentable

False

Rule Version

EX19-MB-000008

Severity Override Guidance

Open the Exchange Management Shell and enter the following command:

Get-OwaVirtualDirectory | Select-Object -Property ServerName, Name, Identity, *Authentication

If the value of "FormsAuthentication" is not set to "False", this is a finding.

Check Content Reference

M

Target Key

5580