Mail Routing for Office 365 Tenant Migration
Achieve zero mail delivery disruption during tenant-to-tenant migrations with Cloudiway's mail routing platform.
Overview
When migrating a domain between Office 365 tenants, organizations typically face a significant challenge: mail delivery disruption during the domain transfer. Cloudiway's mail routing platform provides an alternative solution that ensures continuous mail flow throughout the migration process.
Mail Routing Architecture
Incoming Email
bob@yourdomain.com
Cloudiway
Mail Router
Target Tenant
bob@tenant2.onmicrosoft.com
The Challenge
Moving a domain between Office 365 tenants typically causes two days of mail delivery disruption. During this period:
Traditional Migration Impact
- Emails sent to the domain may bounce or be delayed
- Business-critical communications may be lost
- DNS propagation adds uncertainty to the timeline
- Users experience frustration and productivity loss
How It Works
Cloudiway's mail routing platform automatically routes emails from source domains to target destinations, ensuring continuous mail flow throughout the migration.
Key Features
- Transparent Routing
Mail headers are not modified in any way - recipients see emails exactly as sent
- Automatic Delivery
Emails to bob@yourdomain.com automatically deliver to bob@tenant2.onmicrosoft.com
- Zero Downtime
No mail delivery disruption during the entire migration process
- Simple Cutover
Once complete, update MX records to point directly to target tenant
Requirements
Advance Planning Required
This service requires coordination with Cloudiway's Consulting Services team. Contact your sales manager to arrange setup.
Activation Requirements
- Minimum 5 Business Days Notice
Contact the Consulting Services team at least 5 business days before cutover
- Initial Setup Call
A discovery call to understand your requirements and configure the service
- Testing Before Cutover
Complete testing of the routing configuration before going live
- Additional Service Cost
This is a premium service not included in standard migration licenses
Migration Process
Configure Inbound Settings
Set up inbound mail routing rules in the Cloudiway Mail Routing tool, mapping source domains to target destinations.
Update MX Records
Point your MX records to Cloudiway's mail routing platform to start routing emails.
Complete Domain Migration
Perform the domain transfer between tenants while Cloudiway ensures continuous mail delivery.
Final MX Update
Once migration is complete, update MX records to point directly to the target Office 365 tenant.