Merge pull request #8599 from MicrosoftDocs/chrisda

Update Set-OrganizationConfig.md

Author: chrisda

exchange/exchange-ps/exchange/Set-OrganizationConfig.md

@@ -1615,7 +1615,12 @@ Accept wildcard characters: False
 ### -EnableDownloadDomains
 This parameter is available only in on-premises Exchange.
 
-{{ Fill EnableDownloadDomains Description }}
+The EnableDownloadDomains parameter specifies that Outlook on the web downloads inline images from a different domain than the rest of Outlook on the web. Valid values are:
+
+- $true: Outlook on the web uses a different download domain for inline images (for example, downloads.contoso.com). Before you enable this setting, you need to create a CNAME record and certificate for this domain, and add the domain to the ExternalDownloadHostName and InternalDownloadHostName parameters on the Set-OwaVirtualDirectory cmdlet.
+- $false: The setting is disabled. This is the default value.
+
+For more information about the security vulnerability that's addressed by this parameter, and for detailed configuration instructions, see [CVE 2021 1730](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-1730).
 
 ```yaml
 Type: Boolean