Quarantine guides
The holding area for emails detected as spam, phishing, or malware by Exchange Online Protection and Defender for Office 365. See the glossary entry →
10 guides touch on quarantine.
- BIMI and brand indicators in email
BIMI shows your brand logo next to email from your domain in supported clients. Here's the setup and the prerequisites.
- Defender for Office 365 quarantine workflow
How users and admins work with quarantine — release, request, report, and the policy decisions behind it.
- DMARC rollout from p=none to p=reject
How to roll out DMARC enforcement progressively — the journey from monitoring to enforced anti-spoofing.
- Exchange Online anti-spam and anti-phishing
The layered defences Exchange Online uses against spam, malware, and phishing — and how to tune them.
- Exchange Online Protection transport pipeline
How email flows through EOP — connection filtering, content filtering, transport rules, and the deliverability checks.
- Investigating a phishing message that got past defences
Runbook for a phish that landed: find every copy, purge it from mailboxes, find who clicked, submit it so filters learn, and work out why it got through.
- Microsoft 365 domains and DNS setup
The DNS records every Microsoft 365 tenant needs — and what each one does.
- Microsoft 365 tenant audit checklist
A practical checklist for auditing a Microsoft 365 tenant's configuration, security posture, and compliance.
- Microsoft Defender for Office 365 explained
What Defender for Office 365 adds on top of EOP — Safe Links, Safe Attachments, AIR, attack simulation — plus Plan 1 vs Plan 2 and the settings worth tuning.
- Outlook Focused Inbox and the legacy Clutter folder
How Focused Inbox separates important mail from the rest, and what happened to its predecessor Clutter.