Add Active Directory in a MAC/Linux environment, current Linux DNS server use mycompany.com, should AD use mycompany.lan or mycompany.com, which is better? We are not going to replace linux DNS server recently. Most MAC clients will not join windows domain. I thought using .lan is better(MAC has some issues with .local). Just need to add a conditional forwarder in Linux&AD DNS servers. If using the same .com domain name, will it cause problems, any benefit?