We have an old AD environment consisting of various servers for multiple purposes:
2x Domaincontroller (AD01 and AD02)
1 MS VPN Server (VP01)
1 Mailserver running Lotus Notes
I would like to minimise the amount of servers, and have already consolidated the Fileservers. Now that the 2003 Server is EOL I want to upgrade the Domaincontrollers and decommission the VPN server.
The VPN server VP01 acts as a gateway for the Users and provides the logging of Routing & Remote Access functionality. The certificates for the VPN clients are handled by the Backup DC (AD02)
And now for the very broad and general Q.....How do I upgrade the two DCs to Windows 12R2 and configure VPN? Will my other 2003 servers that I am not upgrading talk to the new servers no problem?
I appreciate that this is a very non detailed question, but as I don't even know where to start, I thought this could be an iterative process...