In Exchange Server 2010, there is no more single instance storage (SIS). This was a feature which allowed multiple attachments and messages to be stored once with a reference being held in each mailbox. The concept which had been with Exchange for years, had been intended to save space. So what happened? To hear it from the exchange team, disks are cheap and the ability to have users on separate servers and in different databases decreased the value of SIS to the point where it is no longer relevant. I would say more complex to implement effectively too. So the … Continue reading Exchange 2010–Did you know Single Instance Storage is gone?