There are a few things that you must decide, and information you must have on hand, before moving your business to Office 365.
When you are ready to run the Office 365 setup wizard and move your domain to Office 365, here is the information you must have on hand:
Each person in your business can install the Office 2016 suite of apps (Word, Excel, PowerPoint, and so on) on up to 5 PCs and Macs. See the operating system and computer requirements for installing Office 2016 suites for business. Office 365 mobile apps can be installed on iOS, Android, and Windows devices. You can find information about mobile device and browser support in How to Install Office 365.
Do you want to integrate with your on-premises Active Directory? You can integrate your on-premises Active Directory with Office 365 by using Azure AD Express Settings.
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