How to track User Profile Sync Issues in SharePoint 2013

User Profile Synchronization is a default feature that we gets with SharePoint 2013. When we need to migrate User accounts, properties to SharePoint we are using User Profile Synchronization. But due to various reasons we are failing to do so. 

To Track those issues we are getting a cool utility with SharePoint 2013.

It is miisclient located in /15/Synchronization Service/UIShell

After Open this utility we can see all synchronization attempts and the results.

It is called "Synchronization Service Manager on SERVERNAME".

There we can identify all attempts, time, status and Errors.

Here it says, "Replication Access was Denied" when trying to sync.