I am planning to replace sbs 2008 premium (with SQL) to server 2012 R2 + Exchange 2013 + SQL 2008.
I would not migrate but install as new.
Users won't be more than 50.
SQL database is a small one not more than few GB. with not more than 8 simultaneous users.
As we can use only two virtual instance on std 2012 R2:
I am thinking to install server 2012 std R2 as host with two 2012 R2 virtual instances.
On first machine i.e host: GUI + HyperV role would installed.
On first virtual machine: server 2012 as DC with essential experience role & SQL 2008 (SQL license we are reusing as it is leftover from SBS 2008 prem)
On second virtual machine : Server 2012 R2 with exchange 2013
On this physical machine I am thinking to add three set of HDD Raid.
Each RAID set for each windows server instance.
Thinking to buy IBM System x3300 M4.
1. Please let me know if anywhere I am wrong.
2. Total licenses required other than CAL? would like to buy least possible licenses.
3. what should be the back up plan? SBS used to have full box restoration using single USB backup drive.
4. What should be the suggested hardware configuration of the machine.