Organisation administrators can invite, edit, and remove users from Settings → Users.
Inviting a user
Go to Settings → Users
Click Invite User.
Enter their email
Enter the user's Microsoft 365 email address and select their role (Admin, Editor, or Viewer).
They sign in
The invited user simply signs in with their Microsoft 365 account. They'll be automatically associated with your organisation.
Only users with Microsoft 365 accounts in your Azure AD tenant can be invited. External users from other tenants need to be added as guests in your Azure AD first.