In my location I have all clients authentiating to the same preferred
server. If it is down for any reason our help desk gets numerous calls
in the morning and users must be directed to an alternate server -
messy. I'd like to build a 2-node cluster and point all clients to the a
virtual server so we are free to perform maintenance on either node
without affecting the early morning authentication traffic.

Are there issues associated with making a virtual server the preferred
server for my clients? I've tested it and it appears to work fine...