Teamspeak Support :: Not able to add Server Admin status to a user inside my teamspeak server

We do not recommend this option, we suggest using the web panel to add server admin (How to add server administrator.
We strongly recommend that you keep your "Server Admins" to a bare minimum of trusted friends to avoid unwanted abuse and takeovers.
  1. Login to your control panel and click "Manage Server".

  2. At the top click on the "Group Permissions" icon at the top.



  3. Click on the Server Admin link under where it says "Group Permissions."
  4. Click on the "Privileges" tab.
  5. Set "PrivilegeGrantSA" to YES.
  6. Scroll to the bottom of the page and click on the Save button.