Suppression rules may be edited to unintentionally suppress more alerts in the Microsoft Defender 365 portal

 User impact: Suppression rules may be edited to unintentionally suppress more alerts in the Microsoft Defender 365 portal.

  Current status: We've determined that a code regression is inadvertently causing edited suppression rules to unintentionally suppress more alerts in the Microsoft Defender 365 portal. In an attempt to prevent further impact, we've introduced validation logic which will prevent users from saving invalid rules which we suspect is causing impact. To further mitigate impact, we're working on a fix to address existing impact from rules already created that have suppressed other alerts. Scope of impact: Impact is specific to users who are served through the affected infrastructure. Root cause: A code regression is inadvertently causing edited suppression rules to unintentionally suppress more alerts in the Microsoft Defender 365 portal.

Golden rule - 12

 RTFM

Read documentation to the end before you do. Take a deep breath, grab a cup of coffee (or your preferred beverage), and dive into that documentation like a fearless adventurer. Trust me, it'll save you a ton of time and frustration in the long run.

Meaning:
Before asking for help or trying to troubleshoot a problem, read the official documentation or manuals for the product, system, or software. Most issues are already covered there.

Why it matters:

1. Saves time: Reduces trial-and-error and unnecessary support requests.

2. Builds knowledge: Helps you understand the system more deeply.

3. Encourages self-reliance: Strengthens problem-solving skills.

4. Reduces mistakes: Prevents misconfiguration or misuse of systems.

5. Improves efficiency: You can implement solutions faster with documented guidance.

Key Practices:

• Always check the official docs first (vendor manuals, knowledge bases, internal guides).

• Search for FAQs and troubleshooting sections before experimenting.

• Keep a personal reference of useful guides for quick access.

• Combine reading with testing—understand concepts, then try them safely.

Friendly Reminder:

RTFM doesn’t mean “don’t ask for help” — it means do your homework first, so when you do need help, the question is informed and precise.

How To Use Check Fish Scanner -An AI-powered scanner that analyzes the safety of URLs right from your inbox.

 

How To Use Check Fish Scanner

CheckPhish Scanner for Outlook is an AI-powered scanner that analyzes the safety of URLs right from your inbox.

Find your add-in under Home tab > Get Add-ins > Admin-managed > CheckPhish Scanner for Outlook

Right now it is implemented in few computers, once it will be implementen in all Teams Transport organization, you will receive email ( please see picture)

Once Check Phish Scanner plug in implemented in your cmpuer ( it will be unatendet implementation) you need manualy click on fish icon, to scan suspecious email.

Scan done per one email that you choose to scan, in your mailbox. It wont work in shared mailboxes.