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Before you begin

Before integrating your Microsoft 365 managed domain name with Trend Micro Email Security, perform all steps recommended by Microsoft to complete configuration of Microsoft 365 email management for your domain.
To configure inbound connectors, ensure that you have an Microsoft 365 administrator account.
Some organizations use Microsoft 365 to remotely host their email architecture, allowing Microsoft to manage the day-to-day aspects of maintaining their email servers. Trend Micro Email Security integrates with Microsoft 365 to provide additional security and benefits.
Configure Microsoft 365 connectors to allow email traffic to and from Trend Micro Email Security MTAs.
Important
Important
Consult the Microsoft 365 help for information about adding connectors. Some Microsoft 365 plans do not offer connectors.
Configure mail flow using connectors in Exchange Online

Procedure

  1. Log on to your Microsoft 365 administration center.
  2. In the navigation on the left, go to Admin → Admin centers → Exchange
    The Exchange admin center screen appears.
  3. In the navigation on the left, go to mail flow, and then click connectors in the top navigation.
  4. Do the following to add an Inbound Connector to Microsoft 365:
    Note
    Note
    By adding an inbound connector, you can configure Microsoft 365 to accept mail filtered by Trend Micro Email Security for delivery to email accounts in your Microsoft 365 managed domain.
    1. Click the plus (+) icon.
      A new connector configuration screen appears.
    2. In the Connection from field, select Partner organization.
    3. In the Connection to field, select Office 365.
    4. Click Next.
    5. In the Name field, type a descriptive name for the connector.
      For example, type Trend Micro Email Security (Inbound).
    6. Select the Turn it on check box.
    7. Click Next.
    8. Select By verifying that the IP address of the sending server matches one of the following IP addresses, which belong to your partner organization, and add the following Trend Micro Email Security IP addresses:
      • United States:
        18.208.22.64/26
        18.208.22.128/25
        18.188.9.192/26
        18.188.239.128/26
      • Germany:
        18.185.115.0/25
        18.185.115.128/26
        34.253.238.128/26
        34.253.238.192/26
      • Australia:
        13.238.202.0/25
        13.238.202.128/26
      • Japan:
        18.176.203.128/26
        18.176.203.192/26
        18.177.156.0/26
        18.177.156.64/26
        15.168.56.0/25
        15.168.49.64/26
        15.168.56.128/26
      • Singapore:
        13.213.174.128/25
        13.213.220.0/26
      • India:
        3.110.59.128/25
        3.110.71.192/26
      • United Arab Emirates:
        3.29.202.0/25
        3.29.194.192/26
      • United Kingdom:
        18.98.163.192/26
        18.98.164.128/25
    9. Click Next.
    10. Select Reject email messages if they aren't sent over TLS, and then click Next.
      The New connector confirmation screen appears, displaying all the settings that you have configured.
    11. Click Create connector.
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