UCF STIG Viewer Logo

Outlook Anywhere (OA) clients must use NTLM authentication to access email.


Overview

Finding ID Version Rule ID IA Controls Severity
V-33607 Exch-1-402 SV-44027r2_rule Medium
Description
Identification and Authentication provide the foundation for access control. Access to email services applications require NTLM authentication. Outlook Anywhere, if authorized for use by the site, must use NTLM authentication when accessing email. Note: There is a technical restriction in Exchange OA that requires a direct SSL connection from Outlook to the CA server. There is also a constraint where Microsoft supports that the CA server must participate in the AD domain inside the enclave. For this reason, Outlook Anywhere must be deployed only for enclave-sourced Outlook users.
STIG Date
Exchange 2010 Client Access Server STIG 2017-01-03

Details

Check Text ( C-41714r3_chk )
Open the Exchange Management Shell and enter the following command:

Get-OutlookAnywhere

If the value of 'Client Authentication Method' is not set to 'NTLM', this is a finding.
Fix Text (F-37499r2_fix)
Open the Exchange Management Shell and enter the following command:

Set-OutlookAnywhere -ClientAuthenticationMethod NTLM