Hi All, I am acquiring a Mac OSX 10.8 server from another University and have some questions that pertain to getting on the network while keeping everything running properly. We have an Enterprise firewall that I have to submit for exceptions. It is a mac mini running server 10.8 with the following services showing as active: Mail, Calendar, Contacts, Filesharing, Software updates, and DNS. The owner and group use it as a file server, backup server with ChronoSynch, and to run one persons Calendar and Contacts (CalDev/CardDev). May questions are as follows: 1. The DNS service is running. How do I determine if it is actually being used/is necessary for any app, service or client, or if it was merely on by default when the server was built, and not really needed by anything (like CalDev, CardDev, Mail, File Sharing). 2. In regard to the CalDev/CardDev, if the DNS name/host name of the server is changed, will the calendar and contacts remain intact, where the user will merely have to reconfigure their clients using the new DNS name? 3. In regard to the Contacts, I read a write up where it says to run Open Directory and have Apple Push Notifications configured. Is Open Directory Proxy what I need to allow in regard to a firewall protocol exception? [(port 625,TCP(ODProxy) (Unregistered Use)-dec_dlm Open Directory, Server app, Workgroup Manager; DirectoryServices in OS X Lion and earlier.] Also, how should Apple Push Notifications be configured? 4. In regard to the Mail service running, I know the users will use our Enterprise mail system but it seems that CalDev needs smtp and imap to send out and receive invitations. If not using this feature, can one skip this part of the use/configuration of it, or is it needed for other reasons? Is this a reason to setup and run the Mail service on the server even if users wont use this feature? 5. In regard to the Contacts, why would I need to publish LDAP contacts through the service and really, how does contacts/CardDav use LDAP?