Originally Posted by RazzMaTazz
Contacts and calendar events added to the phone (or edited on the phone) do synchronize back to Outlook through the Hotmail servers. How quickly that happens depends on your synchronization settings in Outlook and on the Android device. I've got Outlook set to sync every 5 minutes but I hit the F9 key if I want it to manually force a synchronization with the Hotmail servers. I've got my Android phone syncrhonization frequency set for "Push" but I'm not sure if that means that it immediately pushes changes to the Hotmail server. In my experiments, phone based changes seem to appear on the Hotmail severs within seconds, at which time they're available to Outlook at the next Outlook-Hotmail synchronization.
Thanks...my settings were set to Push sync, and I was looking at the Hotmail calendar on the web - it never picked up the events I added that night, just checked and they still aren't there...
As noted, sync from the Hotmail calendar to the phone was almost immediate.