The combination of CRM capabilities and productivity tools gives you the ability
to easily create and manage customer interactions with everyday tools such
as email, shared calendars, IM, video conferencing, and document collaboration.
e.g. Two Clouds do equal a storm of productivity.
Here is how you can evaluate this joint solution -- http://crm.dynamics.com/office365
By following this trial link it provisions a 30-day trial of Dynamics CRM Online. To add the trial for Office 365 select the “Trial” for Office 365 “E3” via the Purchase section of “Subscriptions”
If you already have a Office 365 subscription, select the “Trial” for Microsoft Dynamics CRM Online in the subscription shopping cart
Before users can take advantage of the solution, you need to assign them licenses to either Office 365 and Dynamics CRM Online.