How do I test my Failover Cluster in Exchange 2010. I have 2 servers with the following roles on both servers. CAS/HUB/MB. I have a CAS Array set up as well as a DAG. I have successfully made copies of the DB. Today I turned off SVR 1 in the hopes that failover would work. It did not. The Database copy took a bit, but it finally mounted on SVR 2. I can open up Outlook 2007 for my test user account, it is kind of slow, but it opens and that is all I can do. I cannot send or receive email to that test account. My Exchange is still in its testing stage and I have successfully created a couple of test accounts and mail flow does work for inbound and outbound traffic, but did not work during my hard failure test. What am I missing? I have been unable to find steps to simulate a hard (not planned) failure and a soft (planned) failure.