Getting started with backing up Exchange Online includes completing the Office 365 guided setup—which helps you perform some of the required setup tasks—adding the mailboxes that you want to back up, and performing a test backup and restore.
Important: If possible, perform the getting started process in a test environment. After you perform a test backup and restore, you can move the system into production.
Verify that your environment meets the system requirements for Exchange Online.
Complete the Office 365 guided setup, using either the express configuration option or the custom configuration option:
The express configuration automates some configuration steps, but it requires you to temporarily disable multi-factor authentication for the global administrator account.
If you can't disable mutli-factor authentication for the global administrator account because of security concerns, use the custom configuration option.
What to Do Next
After you complete the getting started process, you can configure the Exchange Online app, including the following: