I have a test hyper-v exchange server 2013 CU5 and it takes over an hour to start. It will load the desktop and then sits for an hour. Clock even does not update. When it does become active most of the MSX services have not started. They can be manually started and it then works ok. IP6 is enabled and setup.
The AD, DHCP and DNS are on another 2012R2 VM. I have attached a file with the errors in the event log. There are more errors after the included and can be supplied if required.MSX-Event-log-errors.txt