Create MX Record to Connect with Outlook.com Server for E-mail

I'm trying to create a MX Record to have my email connect with outlook.com - I created the MX record in Domain Name -> Edit -> Adv DNS Settings

I entered excaliburcom.com. for my source, 10 as my priority and then my destination provided by outlook.com - I also added a "." at the end of both the source and destination

I'm not sure where to go from here because it's not verifying with outlook so I cant send / receive mail.