To add a local admin you have to open Powershell as an admin on the computer you want the user to be local admin on. If you are not an admin or do not have the credentials, please contact your IT Department.
After Powershell is open you type the following command to make a user a local admin on the system.
Azure Account
net localgroup administrators /add “AzureAD\[email protected]”
Domain account
net localgroup administratord /add “Domain\username”