Microsoft uses a similar sales pitch as it does for enterprises to explain why SMBs might want to choose Windows Mobile products over the BlackBerry. "We provide a cohesive solution that allows small and medium businesses to get mobility solutions without the need to change their environment or add additional servers," Valdez said. In contrast, companies that want to manage their own BlackBerry users must buy the BlackBerry Enterprise Server or the BlackBerry Professional Software, which work in conjunction with Exchange or Lotus Notes.