well activesync SHOULD work without a problem for you
However better safe than sorry download
http://forum.xda-developers.com/showthread.php?t=299705 on your windows mobile first and backup to an sd-card or anything and keep it in a safe place
then initiate your partnership using active sync
If all goes well you are lucky but in case of problems
1) hard reset your device
2) delete the partnership
3) create a new outlook profile
4) setup a new partnership and sync (yes both empty)
5) restore the contacts from the backup taken earlier
6) sync again