If they are flagged as high confidence phishing, the only real option is to submit these to Microsoft as false positives:
Do Anti-Phishing Advanced Thresholds Affect Anti-Spam Detections in MDO?
Currently I am facing a predicament with a high volume of emails being flagged as high-confidence phishing under the "Advanced filter" detection technology by our anti-spam policy, a vast majority of which appear to be benign. I have noted the "Advanced phishing threshold" in the anti-phishing policy, which is described as "These thresholds control the sensitivity for applying machine learning models to messages to determine a phishing verdict"
I have not, however, found any concrete evidence that these 2 settings in completely different policies are in any way related. Is there any way to tune the thresholds for the "Advanced filter" detection technology?