Using a private endpoint for Exchange Online Relay - GCC high

Rider, Justin 0 Reputation points

We have an online only configuration in Azure GCC high. We have virtual compute.

We would like to setup an SMTP relay to be used for notifications as a trusted connection to exchange online.

I understand the documentation here:

My question:
Can I use a private connection as a connector in exchange online ? The goal is to not route the traffic publicly.

Note: It does not appear that Email SMTP support through Azure Communication Services is supported in GCC High tenant (

Azure Virtual Machines
Azure Virtual Machines
An Azure service that is used to provision Windows and Linux virtual machines.
7,514 questions
Azure Virtual Network
Azure Virtual Network
An Azure networking service that is used to provision private networks and optionally to connect to on-premises datacenters.
2,278 questions
Microsoft Exchange Online Management
Microsoft Exchange Online Management
Microsoft Exchange Online: A Microsoft email and calendaring hosted service.Management: The act or process of organizing, handling, directing or controlling something.
4,359 questions
{count} votes

1 answer

Sort by: Most helpful
  1. Bruce Jing-MSFT 2,520 Reputation points Microsoft Vendor

    Hi,@Rider, Justin

    Thanks for posting your question in the Microsoft Q&A forum.

    According to your description, here are my suggestions:

    In Exchange Online, follow the documentation to set up a connector, but when configuring the connector, you need to use the private IP address or internal DNS name of your internal relay server instead of the public address.


    Regarding Azure question, it is separate from Exchange Online. In order to better solve your problem, I will add Azure tag to your problem.


    0 comments No comments