Windows 10 allows you to join your computer to the Azure Active Directory and login with your cloud credentials. The first account that joins the AAD becomes a local administrator. Subsequant users are not.

To add additional azure accounts as local admins you need to do the following…

1. Open up a command prompt with Administrator proviledges
2. Enter the following command…

net localgroup administrators /add "AzureAD\<users office 365 email address>"

You should see “The command completed successfully”, now go check it worked by going into computer management > Local Users and Groups > Groups > Administrators and check to see if the user is listed.