Creating a new organization in Office 365 is relatively easy. You need a valid domain, a unique tenant name and if you want to use it beyond the 30 days trial period a valid credit card.
Before creating (or provisioning) a new tenant you have to select the Business Plan that will match your business needs. You can find a nice overview of all Office 365 Business Plans on the Microsoft site via http://bit.ly/CompareAllO365BusinessPlans.
When you scroll down you’ll the Business Plans that have a free trial available. In this blog post I’ll focus on the Enterprise E3 plan.
When you click Free Trial at the bottom of the page you can configure a new tenant in Office 365 with a 30 days trial period. You need to enter you name, email address, telephone number and organization name as shown in the following figure.
The next step is to create your first user ID. This will automatically the Global Administrator of your Office 365. I always recommend not using a regular user for this, but create a dedicated administrator with an appropriate name like admin or administrator.