This is not an all together easy question to answer, but if you haven't already done a search for it in this forum (there are alot of answers in here), you can get around the security prompt by using any of the following methods:
I have used clickyes but not the security policy method. Clickyes does what it says but I found it a bit annoying that it seems to beswitching applications and other minor stuff when the security prompt appears.
My method is to set the synchronizing time to somewhere around 1+ hours. That way you don't really need the other methods but you still get a fair amount of updates during a day.