I have marked 2 data breaches done and they still appear

Hello Scott Moore

Marking a breach as Done does not stop Microsoft Defender from monitoring for new breaches. The previous breaches may remain visible as part of your alert history rather than disappearing completely.

Please make sure Microsoft Defender is fully updated, then sign out and sign back in to refresh the dashboard. You can also confirm that the email addresses and other identity details you want monitored are still listed in the identity monitoring section.

Since the two breaches have remained unchanged for over a year and you are concerned about missing newer alerts, if you need further insight, you can contact Microsoft Support for assistance:

Please note that this is a user-to-user support forum. Moderators and contributors, including external Microsoft employees, are not allowed to directly interfere with Microsoft product features or access back-end systems. Our role is limited solely to providing technical guidance on reported incidents, requests, or ideas.  

1. Open a website link - Contact - Microsoft Support 
2. In the box below "We're here to help", type Microsoft 365, click "Get Help", and then click "Contact Support" below. 
3. In this section, you will need to sign in to your Microsoft account. 
4. Select "Microsoft 365 and Office" under Products & Services, select "Technical Support" as the category, and click to confirm 
5. You can select " Chat with a support agent in your web browser " to access the chat window. 

I hope you can get this issue resolve, have a nice day.