I managed to sync 3500 contacts and several hundred appointments, tasks and notes from Outlook 2007 to my N900 using Nokia PC Suite on Win7 and I was understandably very happy that it worked!

However. it didn't keep working. After many successful syncs back and forth (over BT), one day I noticed something suspicious--PC Suite had stopped picking up changes in Outlook! I was adding tasks and updating contacts on my laptop but they were NOT being sent to the N900. However, changes were still going the other way.

I wasted several days uninstalling/reinstalling PC Suite, trying USB, deleting all the N900 data and starting over, etc. all to no avail. With the amount of data I have, PC Suite breaks down at some poinht.

So I called Nokiia N900 Tech Support and they told me that Outlook synchronization is not officially supported by the N900 at this time and the problems with be resolved in a firmware update this year.

Hopefully, you won't experience the problem I'm having and hopefully the fix will be released soon. Because this is my business tool and I have a lot of info to manage.