Those users whose mailboxes were moved from exchange 2003 to exchange 2010 are getting the Sync Issues in their outlook. One example is as below:
11:32:54 Synchronizer Version 14.0.6025
11:32:54 Synchronizing Mailbox 'Username'
11:32:54 Synchronizing local changes in folder 'Drafts'
11:32:54 Uploading to server 'Servername.domain.com'
11:32:54 Synchronization of some deletions failed.
11:32:54 	 1 item(s) deleted in online folder
Do you know why this is happening and how to resolve it?