This blog is a continuation to Part 3.
TechPoss Organization – Exchange One-to-Many Hybrid Setup
Techposs organization have the users of Technically Possible synced to Office 365 tenant tenant1.onmicrosoft.com and users of Hybrid Shell synced to Office 365 tenant tenant2.onmicrosoft.com.
Exchange Hybrid Design
Techposs decided to use Full Hybrid Migration model after analyzing the Mailbox migration advisor options. Techposs has chosen Classic Hybrid over Modern Hybrid since Client Access URLs of Techposs are already available from internet.
Existing client access URL mail.tchnicallypossible.com will be used as the MRS end point in both tenants.
New MRS end points can be considered for following scenarios.
1. Applying bandwidth controls on dedicated IP or URL
2. Redirecting the MRS traffic to a different site or link
Mail Flow
Centralized Transport will be used in both tenants. All outbound mails will be routed via OnPrem exchange and gateways.
MX records will not be changed for both domains and existing SMTP gateway solution will be used as the gateway. MX changeover to EOP will be done at later stage.
SMTP traffic between Exchange and Exchange Online are newly configured in the firewalls using the existing name mail.technicallypossible.com. Firewall communication is restricted to port 25 on Office 365 IP ranges.
HYBRID SETUP1 – TECHNICALLYPOSSIBLE.COM
Login to the exchange server and sign into exchange online administration portal of the tenant tenant1.onmicrosoft.com using internet explorer or new edge. Click on the Configure button to download the hybrid deployment wizard.
Choose the Exchange Server from the list.
Enter the On-premises Exchange Admin credentials and tenant1.onmicrosoft.com Global Admin credentials.
Verify the credentials and connectivity.
TechPoss decided to use Full Hybrid and decided to setup the hybrid configuration manually instead of Organization Configuration Transfer.
Since client access and transport urls are already available from internet Classic Hybrid is selected.
Enter the On-premises credential to create migration end point
Mailflow is configured between Exchange and Exchange online is through Mailbox servers and centralized transport is selected as the option.
Selected the Exchange servers for Inbound mails from Exchange Online.
Selected the Exchange servers for Outbound mails to Exchange Online .
Selected the Certificate for Hybrid SMTP TLS.
Specified the namespace for Inbound mails from Exchange Online. MRS endpoint will be created using the same name space.
Run update to complete the Wizard.
HYBRID SETUP2 – HYBRIDSHELL.COM
Hybrid Configuration Wizard is already installed part of the previous steps. Launch the wizard to run hybrid for tenant2 tenant2.onmicrosoft.com. Repeat the steps as in the previous hybrid.
Choose the Exchange Server from the list.
Enter the On-premises Exchange Admin credentials and tenant2.onmicrosoft.com Global Admin credentials.
Verify the credentials and connectivity.
Select Full Hybrid and unselect Organization Configuration Transfer.
Select Classic Hybrid.
Enter the On-premises credential to create migration end point
Mailflow is configured between Exchange and Exchange online is through Mailbox servers and centralized transport option is selected.
Selected the Exchange servers for Inbound mails from Exchange Online.
Selected the Exchange servers for Outbound mails to Exchange Online .
Selected the Certificate for Hybrid SMTP TLS.
Specified the namespace for Inbound mails from Exchange Online. MRS endpoint will be created using the same name space.
Run update to complete the Wizard.
Hybrid configuration is completed from one Exchange Organization to 2 Office 365 tenants. Repeat the Wizard for setting up additional hybrids ( if any )
Whats Next
In the next parts we will see the One-to-Many Configuration details and setting up Sync-GalToMutipleTenants tool for address book synchronization.
Part 3 – Continue Reading – Part 5
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