I currently have Exchange and Gmail syncing contacts. Is there any way to stop the duplicates that create because I have contacts in both? E.g, there are currently multiple entries for the same portion of a contact. See example:

Jane Smith

Gmail
Mobile 1234567890
Email [email protected]

Exchange
Mobile 1234567890
Email [email protected]

Is there a way to delete all contacts and have it just sync one or the other?