Is there anyway that my droid X can sync with my Microsoft Outlook calendar?
Also, when want to send a picture or a file, it defaults to my Yahoo mail account, can I have everything sent from my comcast account which I also have on the droid?
Go into the comcast email account that you want to use as default. Settings>Account settings>Make default. Go into the yahoo account and uncheck this option.
By the way you have this posted in the wrong area.