My company is opening a new site in a different country. We will be installing new servers there and I have a question I can't decide on. Should we create a new domain in the forest or should we just use the same domain and implement a new domain controller, possibly and RODC?
The two companies are separated, but collaborate tightly. Also we manage IT for both of them, but I can't exclude they might have an IT of their own when they grow up. We access common network shares and might use resources located in both companies. Also, some of our users are often traveling from one company to the other.
The advantages I see in a new domain are mainly related to a tidier organization, better management in case of a dedicated department while still retaining the advantages of using GPOs from the forest. I'd set up a trust to let users access data in different domains.
The only disadvantages I see might be in having to add both usergroups in some cases and possibly some kind of problems with software based on AD if not properly set. I have no experience with this, so I'd like to hear your opinion about it and maybe help me figure out where the issues might arise.