If you want to backup with only COS backups on ESX server then follow these steps.
Upon upgradeing to 5.4 or 5.5 automatic transport is selected. This caused Advanced (SAN\Hot-add) to be attempt.
Your jobs are now set to use the Console (COS) for backups. You may want to make sure optimize your service console by following this KB: https://support.quest.com/SolutionDetail.aspx?id=SOL77393