message-trace

Hands-on Exchange Online and Microsoft 365 messaging support lab covering mailboxes, licensing, permissions, message trace, quarantine, mail flow, PowerShell, and Outlook troubleshooting.

Report the Exchange Online messages sent to more than 25 recipients from the message trace (Microsoft Graph to SQLite to CSV/HTML), counted before distribution list expansion, one row per Message ID. PowerShell 7.

Mailflow delay attribution engine (Microsoft vs Internet) with next-step recommendations.

Exchange Online message trace at scale through the Microsoft Graph API (v1.0): query planner that respects the tenant quota, local SQLite history beyond 90 days, CSV / JSON / HTML reports.