A. You can verify your Exchange single-instance storage ratio by viewing the Single-Instance-Ratio counter for the MSExchangeIS-Private and MSExchangeIS-Public objects. A ratio of 1 means you aren't seeing any benefits by using single-instance storage, and every message is already only stored once. A ratio of 2 means that on average, every message stored using single-instance storage exists in two mailboxes, so the technology is saving you some space.
Whether you’re on Windows Server 2003 and eyeing the impending end of support, or your Active Directory is running a newer version of Windows Server, there is a ton of new functionality available as you migrate to Windows Server 2012 R2. Join Brian Desmond for 3 technical sessions that will walk you through all the new Active Directory features in Windows Server 2012 and Windows Server 2012 R2.