Exchange Management Shell opens but the Tab key and positional parameters don't work for administrator.

work around

open Windows Powershell

Add-PSSnapin Microsoft.Exchange.Management.Powershell.e2010
$s=$env:ExchangeInstallPath+"bin\RemoteExchange.ps1"
&$s
$t=$env:ExchangeInstallPath+"bin\connectFunctions.ps1"
&$t

Creating a new profile will do.