We are looking to move our Server Farm consisting of multiple Exchange Servers hosting different Exchange organisations, quite a few IIS Servers, DC's, File Servers and few other bits. Most of the Servers are run as Hyper-V Virtual Machines on a number of servers with RAID. We are now an all Mac client side organisation - part of the reason for the change. Another reason is the ongoing costs of upgrading MS software compared to Apple. So far we've got a few Mac Mini's (2014 - 1.4Ghz - 8GB RAM) and a Mac Mini (2-14 - 2.6Ghz - 8GB RAM). We've started playing with OS X Server on our test domains and running it instead of Exchange and IIS. So far we're doing well with it (better SPAM filtering anyway). Only thing we are missing is OWA/Webmail so far. We have a few questions, any help or comments would be much appreciated. 1. How do Mac Admins deal with no RAID? Are Time Machine backups and a standby server OK as a DR plan? 2. As OS X Server doesn't come with Webmail does anyone have any comments about the range of PHP Webmail software available and/or any recommendations/no-no's? Has anyone gone down the no webmail route - if so how's that working out? 3. We are used to Virtualisation and creating VM's for everything. Does anyone have any comments about Parallels Business Edition (for Headless VM's) or using VMware Fusion on a server? Or are people just buying loads of Mac Minis? 4. We haven't brought all of the hardware yet - is it worth buying the 2.6Ghz 2014 Mac Mini with 16GB RAM and the PCIe Disk if you are running VM's hosting servers (Linux or an OS X VM)? 5. Multiple Mac Mini's or a Mac Pro? 5. We need to run a few Linux installations for some Linux software that just doesn't seem to compile and run on Mac so we're thinking of VM's partly the reasons for the questions above. Any responses would be great!