My issue, I have inherited a 400 computer network with 4 locations, each has a separate PDC with active directory. They work fine. each network is static IP addressed because of special software requirements. that was no issue but now our city is running fiber to connect them all together. I am using 192.168.1.2 to 102 for the 1st and 192.168.25.2 to 102 for 2nd 192.168.30.2 to 102 for 3rd and 192.168.38.2 to 102 for 4th. If I change the subnet mask to 255.255.224.0 will all of the computers be able to talk to each other? If not any suggestions on how to make this work. I hope I gave enough information.