@ Geoff_UK – yup, we are updating the Supportability Matrix, should be Stay within number of times. We wanted to find the word out as quickly as possible however as we know our shoppers questioned for this. You will need an on-premises administrator account which includes access to read http://elliottiqygn.bloginwi.com/12703133/the-greatest-guide-to-exchange-server-2010-supported-operating-systems