HA would restart the VM to the other host in cluster
Make sure to read the best practise for exchange http://www.vmware.com/files/pdf/exchange-2010-on-vmware-best-practices-guide.pdf
HA would restart the VM to the other host in cluster
Make sure to read the best practise for exchange http://www.vmware.com/files/pdf/exchange-2010-on-vmware-best-practices-guide.pdf