For inbound delivery of email to Office 365, the following steps need to be performed to ensure that email is correctly delivered from The Packet Hub to Office 365.
Follow the below steps to configure inbound routing for Office 365
1.1 Login to the Office 365 Administration Console.
1.2 Select the Admin.
1.3 Click Admin centers and click Exchange.
2.1 Select the Mail Flow | Connectors menu item and create a new connector.
Complete the P8Mail to 365 Connector - Select Your Mail Flow Scenario dialog as follows:
3.1 Make sure you select From: Partner Organisation and To: Office 365
3.2 Name the connector P8MAIL to 365.
4.1 Add the name for the connector
5.1 Click Use the sender's domain.
6.1 Add * as a senders domain.
7.1 Add the TPH IP networks.
8.1 Confirm settings and save.