Enabling Search for Local Administrator Account in Windows Server 2016
By default, Windows Server 2016 will severely limit the access rights of the local administrator account.
Here are the steps to promote the account so that you can use it as a normal account
Goto Computer Configuration > Administrative Template > Windows Components > Search
Set Allow Cortana to Disabled
Next goto Computer Configuration > Windows Settings > Security Settings > Local Policies > Security Options
Set User Account Control: Admin Approval Mode for the Built-in Administrator Account to Enabled
Now reset the machine and the local administrator will behave like a normal user account