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Exchange Online Mailflow Connector

Configure mail flow using connectors in Exchange Online | Microsoft Learn

Step-by-Step Instructions:

  1. Log in as an Admin to the O365 Exchange Admin Centre (admin.exchange.microsoft.com).

  2. Navigate to Message Flow > Connectors.

  1. Set Up the Connector:

    • From: Office 365.

    • To: Partner Organization.

  2. Name the Connector: YOUR ARCHIVE Connector.

  3. Scope the Connector:

    • Select "Only when email messages are sent to these domains".

    • Enter the domain as yourarchive.cloud.

  4. Route the Connector:

    • Select "Route Email Through These Hosts".

    • Depending on the region, use the appropriate host:

      • Region: smtp.region.yourarchive.cloud

  5. Set TLS Settings / Security restrictions:

    • Select "Always use Transport Layer Security (TLS) to secure the connection (recommended)".

    • Ensure the certificate is issued by a trusted Certificate Authority (CA).

    • Enter smtp.region.yourarchive.cloud for the SAN (Subject Alternative Name) validation.

  6. Validate the Connector:

    • Use the journaling email (e.g., companytag@yourarchive.cloud) to validate the connection.

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