I have been trying to install Zentyal 4.0 alongside Zentyal 3.3. This mainly for testing purposes, and to see if it is possible to do a migration by moving roles to a second server, without (or with as little a s possible) service interruption. I choose to install as additional DC and it al looks like working. However the domain mudule won't start. There is nothing in the logs (looks like nothing is logged at all!). Is there a how-to on this scenario somewehere?