Exchange Online Mail Flow Audit Checklist: 32 Checks Before You Change Anything (2026)
The 20 checks I run on Exchange Online mail flow before any change: SPF / DKIM / DMARC, connectors, transport rules, anti-spam, SMTP AUTH, Message Trace baseline.The 20 checks I run on Exchange Online mail flow before any change: SPF / DKIM / DMARC, connectors, transport rules, anti-spam, SMTP AUTH, Message Trace baseline.