Get-ADGroup -Filter {objectguid -eq '123' or objectguid -eq '321'}objectguid in '123,321'.Get-ADGroup -Filter '*' | Where-Object { $_.ObjectGUID -in 'xxx', 'yyy', 'zzz' }$Filter = "ObjectGUID -eq '" + ('xxx', 'yyy', 'zzz' -join "' -or ObjectGUID -eq '") + "'"