Enabling Duplicate Detection On CRM 2013 or CRM Rollup 12

Statement from Microsoft:
“Duplicate detection during create and update operations will not be supported for Microsoft Dynamics CRM updated user interface entities. Duplicate detection of individual records won’t be supported for custom entities as well. However, to detect duplicates in bulk, you can use the ‘BulkDetectDuplicatesRequest’ message and the ‘RetrieveDuplicatesRequest’ message….“
It has also been disabled for The refreshed forms on 2011 roll-up 12(Polaris)

Fortunitly Jason Lattimer has devised a solution to this problem.
https://crm2103dupedetect.codeplex.com/


Installation Instructions:
1. Download the Package from  https://crm2103dupedetect.codeplex.com/releases/view/118399 and import it into CRM.
2. On the entity form you need to attach the following js files

• lat_/CRM2013DuplicateDetection/scripts/SDK.Metadata.Query.min.js
• lat_/CRM2013DuplicateDetection/scripts/Xrm.DupDetect.js

3. In the Event handlers Add the following to the onload event

Xrm.DupDetect.config [lat_/CRM2013DuplicateDetection/scripts/Xrm.DupDetect.js]

4. In the Parameters Put The following

   [ {"preventsaveduplicate": false} ]

Setting "preventsaveduplicate" to true will prevent records from being saved if a potential duplicate is returned

It Should look like this :

What it looks Like: