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Exchange Online admin foundations

The Exchange half of every M365 tenant — mail flow, hybrid, protection, archiving, and the pieces that keep messages moving correctly.

For: M365 admins with the messaging workload landing in their laps.

9 guides in this path

  1. 1
    Exchange Online mail flow and connectorsHow mail moves into and out of Exchange Online — connectors, transport rules, and hybrid routing.
  2. 2
    Exchange Online anti-spam and anti-phishingThe layered defences Exchange Online uses against spam, malware, and phishing — and how to tune them.
  3. 3
    Exchange Online archiving and litigation holdHow Exchange Online keeps mail beyond the primary mailbox — archive mailboxes, retention, and legal hold.
  4. 4
    Exchange Online resource mailboxesHow room and equipment mailboxes work — provisioning, booking, and admin pitfalls.
  5. 5
    Exchange hybrid deploymentHow hybrid Exchange works — connecting on-prem Exchange Server with Exchange Online, what the wizard actually does, and the path off the last server.
  6. 6
    DMARC rollout from p=none to p=rejectHow to roll out DMARC enforcement progressively — the journey from monitoring to enforced anti-spoofing.
  7. 7
    BIMI and brand indicators in emailBIMI shows your brand logo next to email from your domain in supported clients. Here's the setup and the prerequisites.
  8. 8
    Microsoft Defender for Office 365 explainedWhat 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.
  9. 9
    Defender for Office 365 quarantine workflowHow users and admins work with quarantine — release, request, report, and the policy decisions behind it.
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