Following the launch of Office 365 beta (which is in fact not a real beta as the service is almost ready for production), I started playing around with my access.

I discovered an important limitation: Office 365 is not able to share DNS domain name between Office 365 services.

Indeed, you can’t enable Exchange, Lync and SharePoint at the same time. The only services allowed within one domain name are Exchange and Lync or SharePoint only.