My customer environments have 4000 users.
Their in the mid of deciding to run virtualization (VMware) or physical for Exchange 2007. Which 1 of below will be better option
1. Mailbox1 [2000 users], Mailbox2[2000 users], Cas, HT. All 4 Vms are using DRS and vMotion for HA
2. Mailbox1 [4000 users] Active, Mailbox2[4000 users] Passive, CAS/HT, CAS/HT. All 4 Vms have DRS and vMotion disabled. CCR is used for mailbox and NLB is used for CAS/HT