1. Obtain the public IP address you’re using. A dynamic IP address isn’t supported or allowed. You can share the IP with other devices and users, but you shouldn’t be sharing the IP with anyone outside of your company. Make note of this IP address for later.

2. Log on to the Office 365 Portal.

3. Select Domains. Highlight one of your domains and use the wizard to obtain your MX record. The MX record will look similar to contoso.com.mail.protection.outlook.com. Make a note of the MX record for later.

4. Make certain that the domains that the application or device is sending as have been properly verified. If the domain is not verified, emails could be lost and you won’t be able to track them through Office 365 using Message Trace.

5. In the upper right, select Admin and then select Exchange from the drop down. If you have Small Business, then see the instructions here.

6. In the Exchange Admin Center, select Mail Flow > Connectors.

7. If no inbound connector exists, create one.

   1. Give the connector a name.

   2. Select On-Premises for the Connector Type.

   3. Under Domains, add a single asterisk (*). This will allow sending to any domain. Other values in this field will limit the domains that you can send mail to.

   4. In the IP Addresses section, add the IP address from Step 1.

   5. Leave all the other fields with their default values and select Save.

8. In the DNS for your domain, we suggest that you modify your SPF record to include the IP address from Step 1. The finished string should look similar to this: v=spf1 ip4:10.1.2.3 include:spf.protection.outlook.com ~all where 10.1.2.3 is your public IP address. Skipping this step could cause email to be sent to recipients’ junk mail folders.

9. In the device’s settings, specify a Smart Host value equal to the MX record value you recorded in Step 3.

X