-When you delete user there are could be minor links to him in RT DB.
-This option allow you to replace this links with link to other user.
-This links are Creator and LastUpdatedBy, but NOT any watcher roles,
-this means that if user is watcher(Requestor, Owner,
-Cc or AdminCc) of the ticket or queue then link would be deleted.
+When you delete a user there could be minor links to them in the RT database.
+This option allow you to replace these links with links to the new user.
+The replaceable links are Creator and LastUpdatedBy, but NOT any watcher roles.
+This means that if the user is a watcher(Requestor, Owner,
+Cc or AdminCc) of the ticket or queue then the link would be deleted.