ESX Server 2.5.2 or 2.5.3 with Microsoft Exchange Server in a Clustered Configuration not Recommended with Emulex HBAs
Details
Can I run Microsoft Exchange Server in a clustered environment using Emulex host bus adapters with ESX Server 2.5.2 or 2.5.3?
Solution
VMware has identified a problem running Microsoft Exchange Server in a clustered environment when using Emulex host bus adapters (HBAs) in your ESX Server system. If you are running Exchange Server in a clustered configuration, VMware recommends you do not use Emulex HBAs.