Shooting outdoors is trendy, and it can be fun, and most photographers really enjoy the challenges of shooting with natural light. When you are thinking about photographs outdoors, think about what you plan to do with them. Outdoor photographs are great for every-day casual use, and for use online, but if you need a professional headshot, or are going to use them in printed materials (like business cards), shoot inside. An indoor session allows the photographer to have the greatest control over the lighting, and the elements. Clouds, wind, rain, flat skies, harsh shadows and killer sunshine don't exist in the studio unless the photographer wants them to. (I have yet to create rain inside, but I am working on it...)
So when you are booking a session for a professional portrait to use in business, make sure you are going to be inside for the best results.