If your domain isn't hosted by us, you'll need to create a CNAME record with your domain host. Please see. How do I update my CNAME and MX records to validate my domain and activate email?
Once you have created your CNAME record, you must verify your domain, simply:
- Log-in to MyOffice using your username and password
- Select Email Summary
- Select any that say Requires domain verification eg: email@example.com (requires domain verification)
- Select Check you domain works with Microsoft Office 365
- Confirm that you have registered your CNAME with your domain host
- Select Confirm