FaithEbenezerOquong I already have tickets in about this. "Support" requests I send them copies of the quarantine notifications that Microsoft is sending. It's as if they aren't paying attention. This is being sent by Microsoft from a fake email address Microsoft makes up, usually mailto:Email address removed, but because it's a fake address, it's high confidence phishing and therefore is quarantined, instead of going to Junk Mail like it should.
The other issue was for a Mail Migration Report from a customer I'm migrating to hybrid, and the report email that it sends to alert of the results (from the Migration Batch Wizard) is blocked as high confidence phishing because the domain isn't fully migrated yet.
Look, EVERYTHING just needs to go to Junk Mail. Nobody want to go into a different site if they have Outlook client. The quarantine and entire Defender portal runs very very slowly, and there's no need to send people there unless you run an Enterprise. These people are SMB's and midsize, and they just need to get their mail. They don't know quarantine; they just know they lost mail and business.
Bring back Junk Mail!