It's called leverage and all companies use it.
Of course, M$ is the 800 lb gorilla so it draws a lot of heat. Frankly, I don't mind a patent holder asserting their ownership to their advantage. Even M$. Heck, where would we be without them? Stuck with Apple and BSD Unix? Please. Other posters have said that M$ should declare EXACTLY what is protected. True enough. They will not do so until their feet are held to the fire. Who is gonna do that? Motorola? Maybe but they will just chose to work around activesync. As any breathing rational person already knows the patent/judicial system is broken. Who is gonna fix it? Congress? Hahahahahahahahaha