The site has four servers currently all running Server 2008 R2 Enterprise. Two are domain controllers and two are running exchange 2010. The client will not invest in additional servers as the hardware was replaced not long ago. My thought is to uninstall
exchange 2010 on one of the servers and install 2013 and move mailboxes. Then follow the remaining steps to migration of 2010 to 2013. Are there any issues doing this that could cause disruption of email.
Ronald C. Pope