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You may follow the steps below:

Configure Approved Sender List (Exchange Online and Gmail only)

  1. Go to Policies > select the Organization for which you need to create policies
  2. Click Advanced Threat Protection then click a policy
  3. Navigate to Web Reputation and enable it.
  4. Go to Approved/Blocked List tab
  5. Toggle ON Approved Sender List.
  6. Specify a sender email address or domain name to exclude from Web Reputation scanning
  7. Click Add.
  8. Optionally, click Import to import sender email addresses in batches.
 

Configure Approved/Blocked URL List

  1. Go to Policies > select the Organization for which you need to create policies
  2. Click Advanced Threat Protection then click a policy
  3. Navigate to Web Reputation and enable it.
  4. Go to Approved/Blocked List tab
  5. Toggle ON Approved URL List.
  6. (Exchange Online only) Select Add internal domains to the approved URL list to exclude your internal domains from scanning
  7. Specify a URL to exclude from Web Reputation scanning.
     
    • Be aware that regular expressions are not supported.
    • For URLs with query parameters, Cloud App Security uses exact match. Wildcard characters are not supported.
    • For URLs without query parameters, wildcard characters only in the *.example.com and *.example.com/example/* formats are supported.
    • For Gmail, only URLs without query parameters are supported.
     
  8. Click Add.
  9. Toggle ON Blocked URL List.
  10. Specify a URL to block without Web Reputation scanning.
     
    • The approved URL list takes precedence over the blocked URL list. If a URL is added into both lists, it will be treated as an approved URL.
    • Be aware that regular expressions are not supported.
    • For URLs with query parameters, Cloud App Security uses exact match. Wildcard characters are not supported.
    • For URLs without query parameters, wildcard characters only in the *.example.com and *.example.com/example/* formats are supported.
    • For Gmail, only URLs without query parameters are supported.
     
  11. Optionally, click Import to import URLs in batches.
 

Configure Action

  • Assign an action for the blocked URL list under Action. Quarantine and Delete are supported for most applications and services. Gmail supports Label email, Delete, and Quarantine. Salesforce supports Pass, Quarantine, and Delete.
If the issue persists, please contact Trend Micro Technical Support and provide additional information.
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