I know that Microsoft does not recommend that AD is installed on the same machine with Exchange2010 roles with HUB, CAS and MAILBOX but I have to migrate a DC and Exchange 2003 on a single server.
The new server has windows 2008 R2 Enterprise license, and this license allows Hyper V virtualized domain controller, AD and Global Catalog and have physically installed running Exchange 2010.
That is, a machine with Exchange2010 Active Directory installed and virtualized on the same machine. Or would you rather, (Exchange 2010 Virtualized and AD, DC, physical GC?
What hardware requirements should have the server for good performance with these services and this infrastructure?
Which option is the best of the two described?
850 Users Mailboxes
2 disks 300GB RAID1 with 2 Partitions (System and Logs)
3 disks 1TB RAID5 (3 Databases)
Thanks in advance.