1. Edge Transport servers and Hybrid: Why, or why not?
6/25/2018 7:03 AM
Edge Transport servers and Hybrid: Why, or why not?
Michael Van Horenbeeck (VHCT)
Independent Consultant | MVP
#hybridrocks
#MSIgnite
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2. Setting the scene 6/25/2018 7:03 AM
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3. “Hybrid (IT) is an approach to enterprise computing in which an organization provides and manages some information technology (IT) resources in-house but uses cloud-based services for others.” ~ someone on the internet

4. What is an Edge Transport server?
6/25/2018 7:03 AM
What is an Edge Transport server?
Exchange Transport Server which can be installed in the perimeter network (aka “DMZ”)
Can handle inbound/outbound
Supports Transport Rules (though not 100% the same as regular Transport Servers)
You can deploy additional Transport Agents to extend functionality
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5. Topology w/o Edge Office 365 (EXO) Comp. A Centralized Mail Flow
Non-Centralized Mail Flow
Internet

6. Topology w/ Edge
Office 365 (EXO)
Comp. A
DMZ
Internet

7. Topology w/ Edge & 3rd-party
Office 365 (EXO)
Comp. A
DMZ
Internet

8. Do I require Edge transport servers?
6/25/2018 7:03 AM
Do I require Edge transport servers?
© Microsoft Corporation. All rights reserved. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

9. Common “requirements” to implement Edge
Terminate incoming (hybrid) connections in the “DMZ”
“regular” Exchange Server shouldn’t be implemented in the DMZ (unless you want to make your firewall like Swiss cheese.
Since it’s the only supported way to make hybrid mail flow work in this scenario, you basically have no other option…
Have the ability to dynamically (re)route messages
Although capability also exists in “regular” Transport Services, Edge gives you the benefit being able to handle messages before they enter the [Exchange] organization.
Address re-writing capabilities
Not particularly related to hybrid, but can be helpful in some scenarios.

10. Common reasons not to implement Edge
Additional (Windows) servers to manage
Not the best reputation for mail filtering
Little to no value if you already have alternative 3rd-party filtering solution
Management can be a little daunting (PowerShell-only)
Additional complexity. Less = More!

11. (very) simple flowchart
6/25/2018 7:03 AM
(very) simple flowchart
Are you setting up hybrid?
Keep doing what you’re doing. NO
YES
What purpose will ET serve?
Keep your current solution…
Message
Hygiene
Consider Edge Transport
Terminate Connections in DMZ / Transport Agents
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12. Please evaluate this session Your feedback is important to us!
6/25/2018 7:03 AM
Please evaluate this session Your feedback is important to us!
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13. 6/25/2018 7:03 AM
© Microsoft Corporation. All rights reserved. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.