I have been struggling, first with Zentyal 2.3 which I installed 3 times, now with version 2.2 that I had installed twice. This product is ambitious as it tries to cover many different services in the web interface and configuration, however I found a product that is not reliable at all. My first installation of v2.2 after some experimentation did crash to a point that I could not boot the system back again, and the log files contained no explanation for what was happening. Then I reinstalled the system, but the installation failed twice, because I had deleted all existing partitions in the hard disk, so I had to leave a broken installation to then achieve a full installation (a problem with the partition manager of Zentyal I assume).
I had then several problems with VPN configuration that it worked in the first installation of v2.2, but now I could not access a shared directory in the Zentyal server (with guest access authorization) from a Windows XP workstation, as Windows kept asking my userid and password and nothing was accepted as valid.
Uninstalling the samba and ldap modules and reinstalling them, gave me an error that I could not overcome. Overall I felt frustrated by the time I have spent, by the poor documentation and short community support.
I already tested ISPConfig, a product with less ambitions than Zentyal but that it worked flawlessly, it runs fast, and with adequate documentation.
I will now proceed to other browser administrated server software like ClearOS and Univentation.