HCW Failures & Hybrid Configuration
Hybrid Configuration Wizard failures, validation errors, and hybrid coexistence setup issues.
Prerequisites verification, safe reconfiguration, and state recovery.
Hybrid Exchange & Mailbox Migration Diagnostics
Professional diagnostics for Hybrid Wizard configuration, stuck migrations, free-busy failures, and coexistence problems. Migration integrity verification, data loss prevention, and production-safe rollback procedures.
Hybrid & Migration Problem Categories
Mailbox Migration Stuck
Diagnostic procedures for stuck migrations, corruption detection, and integrity verification.
Data recovery, move request diagnostics, and corruption remediation.
Free/Busy Not Working
Cross-premises free-busy failures between on-premises and Exchange Online.
Availability service diagnostics, certificate validation, and federation trust.
Hybrid Migration Diagnostic Framework
- Verify prerequisites: Trust relationship, certificate validity, DNS, firewall rules
- Validate hybrid topology: Org relationship configuration, sync settings, mail routing
- Check migration scope: Are users provisioned in Exchange Online? Has initial sync completed?
- Assess move request state: Queued, syncing, synced, or failed? What is the completion percentage?
- Review integrity: Item count, folder structure, corrupted items flags
- Verify mailbox coexistence: Users visible in both premises? Routing working?
- Assess federation trust: For free-busy, verify federation organization and trust certificates
- Plan staged rollback: Create new move request vs. restore from backup vs. re-provision
Common Hybrid Issues (By Frequency)
| Issue | Symptom | Remediation |
|---|---|---|
| HCW authentication failure | Certificate not trusted or expired | Validate self-signed cert expiration, update CAA records, re-run HCW |
| Migration stuck at syncing | Move request shows 99% completion, no progress | Check corrupted item count, pause/resume move, or create new request |
| Free-busy unavailable | Users cannot view cross-premises availability | Verify federation trust certificate, check Availability service endpoint |
| Directory sync failed | Users not visible in Exchange Online | Force AAD Connect sync, verify org relationship, check mail attributes |
| Move request failed with corruption | Migration terminated, data integrity concerns | Assess corrupted items, decide full restore vs. selective item recovery |
Ready for Professional Migration Diagnostics?
Our principal engineers provide professional diagnostics and remediation guidance for hybrid configurations and mailbox migrations.