Redirecting public web traffic to Office 365 sharepoint public site

Hello all,

We have OurDomain.com registered with GoDaddy.  DNS is managed at GoDaddy as well.

We now have an Office 365 Public SharePoint site that we want to come up when people type in our domain.

I've created a CNAME record that takes www and points it to ourdomain-public.sharepoint.com.    -  This works fine.

What I can't figure out how to do is redirect when someone types just OurDomain.com. 

I'm assuming that Sharepoint.com does not use unique IPs for each public website, but I could be wrong.

Any suggestions?

Thanks,

-John