1 of 1 people found this helpful
Yes, to both questions. I don't believe there is a limit on the number of Server Administrators but I haven't really tested that!
You can assign the Server Administrator role to any user. HOWEVER, doing so will make that user a CREATOR and consume a Creator license, even if that user has already been assigned a Viewer or an Explorer license.
You can choose to make any user a SITE Administrator as well, and with SITE you have the choice of using a Creator license or an Explorer license for that user. Site Admins have slightly fewer capabilities than Server Admins but that might be OK for your configuration.
You cannot make a Viewer license holder into any kind of Administrator.