Hi I have a farm of 20 Windows 2003 XenApp 4.5 servers (Physical) across 2 sites which are connected by dual Gig links. I have a dedicated ZDC which is virtual. Im looking demising the ZDC and making one of the 20 existing Physical servers the ZDC. What are peoples thoughts on this? Is it preferable to have a VM ZDC solely for this function? My farm is underutilised - runs at 50% so there is capacity. Wondering what your thoughts and what best practice is. Also are there any issues with running the ZDC function on a WIndows 2008 server? All other servers in the farm are Windows 2003.. Thanks