This article goes through the steps to follow to request:
Threat Protection is enabled on the Cloudsoc tenant and at least one of the scan services is enabled (Malware and/or Advanced Threat Protection)
1-To file a request to review a malware scan results on the contents (false positive, false negative ..etc):
Use this URL to file the request : https://symsubmit.symantec.com/ for more information, please visit the following KB article: Submit suspicious files to Symantec Security Response
2-To file a request to review a malicious URL result: