A positional parameter cannot be found that accepts argument

Question

Hi All

I used the following syntax to grant "TempPolicy1" globally. However, I am encountering an error while trying to remove this policy "TempPolicy1" globally Please guide me.

Grant-CsApplicationAccessPolicy -PolicyName "TempPolicy1" -Global

i have used below syntaxes

Grant-CsApplicationAccessPolicy -PolicyName "TempPolicy1" $Null -Global

Grant-CsApplicationAccessPolicy : A positional parameter cannot be found that accepts argument '$null'.  

Grant-CsApplicationAccessPolicy -PolicyName "TempPolicy1" $Null

Grant-CsApplicationAccessPolicy : Cannot bind argument to parameter 'Group' because it is an empty string.