Do I get MailBox with MS Dynamics CRM licensed account? Or Do I need to configure?

Hello,

I just subscribed with MS Dynamics CRM 365 with 1 year based license. I am able to login with CRM Online and get all the functionality. Now, I am trying to open Mailbox for same account on https://outlook.office365.com/. I am getting error that either I don't have Mailbox or I don't have license. As far as license concern, I am a licensed user and I have one year subscription.

Do I need to configure Mailbox from somewhere? If so, please suggest. Please review following screenshot