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Before you begin

Before integrating your Office 365 managed domain name with Cloud Email Gateway Protection, perform all steps recommended by Microsoft to complete configuration of Office 365 email management for your domain.
To configure inbound connectors, ensure that you have an Office 365 administrator account.
Some organizations use Office 365 to remotely host their email architecture, allowing Microsoft to manage the day-to-day aspects of maintaining their email servers. Cloud Email Gateway Protection integrates with Office 365 to provide additional security and benefits.
Configure Office 365 connectors to allow email traffic to and from Cloud Email Gateway Protection MTAs.
Important
Important
Consult the Office 365 help for information about adding connectors. Some Office 365 plans do not offer connectors.
http://technet.microsoft.com/en-us/library/exchange-online-mail-flow.aspx

Procedure

  1. Log on to your Office 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 Office 365:
    Note
    Note
    By adding an inbound connector, you can configure Office 365 to accept mail filtered by Cloud Email Gateway Protection for delivery to email accounts in your Office 365 managed domain.
    1. Click the plus (+) icon.
      A new connector configuration screen appears.
    2. In the From field, select Partner organization.
    3. In the To field, select Office 365.
    4. Click Next.
    5. In the Name field, type a descriptive name for the connector.
      For example, type Cloud Email Gateway Protection (Inbound).
    6. Select the Turn it on check box.
    7. Click Next.
    8. Select Use the sender's IP address, and then click Next.
    9. In the Specify the sender IP address range. field, add the following Cloud Email Gateway Protection IP addresses:
      • North America, Latin America and Asia Pacific:
        18.208.22.64/26
        18.208.22.128/25
        18.188.9.192/26
        18.188.239.128/26
      • Europe and Africa:
        18.185.115.0/25
        18.185.115.128/26
        34.253.238.128/26
        34.253.238.192/26
      • Australia and New Zealand:
        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
      • Middle East (UAE):
        3.29.202.0/25
        3.29.194.192/26
    10. Click Next.
    11. 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.
    12. Click Save.