How to remove duplicate contacts in outlook
It probably happened to you too, you sync your mobile device to outlook and one second after that you find out you have duplicates in your contacts folder.
Here is one way you can handle it.
Select your contact folder and change it view to Phone List:
In this mode you can sort your contacts by Modified date:
You new duplicates are most likely to have the same date and almost the same time, move them to another folder (just in case) and sync your device again.