Message Trace & Mail Flow Analysis
In-depth message trace interpretation for mail flow diagnostics, NDR analysis, and delivery tracking.
The foundational diagnostic tool for all mail-related incidents.
Exchange Diagnostics & Telemetry Analysis
Professional diagnostic tools for root cause analysis in Exchange Online and Entra ID environments. Message trace interpretation, sign-in log analysis, and health checks that pinpoint the root cause of incidents with evidence-first methodology.
Diagnostic Tool Categories
Entra ID Sign-in Log Analysis
Sign-in log interpretation for authentication failures, Conditional Access triggers, and MFA issues.
Evidence collection and forensic analysis for access control incidents.
Exchange Online Health Verification
Configuration health checks, permission audits, and compliance validation.
Comprehensive baseline assessment and configuration drift detection.
Diagnostic Investigation Framework
- Gather context: When did the incident start? What changed? Who is affected?
- Establish scope: Single recipient, domain, department, or tenant-wide?
- Collect telemetry: Message traces, sign-in logs, audit logs, and service health status
- Timeline analysis: Correlate events to identify the triggering change or failure
- Pattern identification: Is this a known issue? Are there similar patterns in other incidents?
- Evidence preservation: Document findings and preserve forensic data for compliance
- Root cause hypothesis: Form testable hypothesis based on evidence
- Remediation validation: Verify fix with post-change telemetry collection
Diagnostic Data Sources Reference
| Data Source | Primary Use | Key Indicators |
|---|---|---|
| Message Trace | Mail flow and delivery issues | Accepted, rejected, pending, failed states; delay duration; NDR codes |
| Sign-in Logs | Authentication and access issues | CA policy triggers, MFA requirement, risk levels, device compliance |
| Audit Logs | Configuration changes and compliance | Admin actions, policy modifications, permission changes, deletions |
| Service Health Dashboard | Tenant-wide incidents and advisories | Service degradation, maintenance windows, known incidents |
| Protocol Logs | Client connectivity and transport | IMAP/POP/SMTP errors, client protocol negotiation, connection states |
Ready for Professional Diagnostic Analysis?
Our principal engineers use telemetry-driven diagnostics to quickly pinpoint root causes and recommend safe remediation.