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The Microsoft Exchange 2013 Client Access Server Security Technical Implementation Guide (V2 R2) has 33 STIG checks. New to STIG checklists? Read What is a STIG checklist?, CKL vs CKLB, and STIG vs SCAP benchmark.
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Discussion Text
New to STIG checklists? Read What is a STIG checklist? and CKL vs CKLB.
If the exchange server does not provide OWA services, this check is Not Applicable.
If the exchange server does not provide external OWA services, https does not need to be assigned to external URL, it may be blank.
Open the Exchange Management Shell and enter the following command:
Get-OWAVirtualDirectory | Select Name, Identity, ExternalUrl, InternalUrl
If the value returned is not both ExternalUrl and InternalUrl and these are not set to https://, this is a finding.
Open the Exchange Management Shell and enter the following command:
Set-OWAVirtualDirectory -Identity '<IdentityName>\owa (Default Web Site)' -ExternalUrl 'https://URL' -InternalUrl 'https://URL'
Note: The <IdentityName>\owa (default web site) value must be in quotes.