As a best practice we recommend that only a few people in your company have this role. Tip: Make sure everyone who is a global admin in your organization has a mobile phone number and alternate email address in their contact info.Check out Change your organization's address, technical contact email, and other information for more details.Manages the document storage for your business on Share Point Online. They can also assign other people to be Site Collection administrators and Term Store administrators.Permissions assigned to Share Point sites are completely separate from the Office 365 global admin role.A person assigned to the Power BI admin role will have access to Office 365 Power BI usage metrics.They'll also be able to control your organization's usage of Power BI features.Here are the available roles and what people assigned to them can do.
Resets passwords, monitors service health, adds and deletes user accounts, manages support tickets, adds and removes members from Office 365 groups.
With the System Administrator security role, you can manage all aspects of Dynamics 365.
For more information about Dynamics 365 security roles, check out Manage subscriptions, licenses, and user accounts.
Global admins are the only admins who can assign other admin roles.
You can have more than one global admin in your organization.