During the provisioning phase, we configure the target Exchange Server to correctly handle messages, processed by Address Rewrite Service. If you want to be absolutely sure that the messages are not blocked by custom filters and antiviruses, add the service's IP address to SPF record in target DNS.
- On Domain Coexistence widget, click Running to locate the event containing IP address of the Address Rewrite Service server.
- Add the IP address to the SPF record in the target DNS. See provider's documentation for instructions.