I am in the process of setting up a trust between two separate domains. Traffic is already able to flow from domain to domain as I have a direct cable connecting the two core switches. This ability has been going on for a few months now. A few weeks ago I set up a stub zone in DNS on both sides. Thus far I have not seen any issues. I am about ready to implement the two way trust between the two. I have never done this and I really do not have anyone who can authoritatively ask questions of. I am not really sure what to expect when I turn the trust on. What should I see? What should I not see? What could go wrong? If something goes wrong, can I turn it off and go back to how it was until whatever issue is fixed?
For a little background, both sides are at a server 2008 2008 R2 level. I do not have any 2003 or later domain controllers. I do have users with accounts on both sides and I am running Exchange 2010 on both sides.
The process itself is simple enough and I do not really anticipate any issues, but not having anyone to talk to about it and doing something like this when it can be potentially problematic is a bit unnerving especially since it is joining two different live networks that controls two businesses.
Thanks in advance for any comments or suggestions.
I am basically following the following guide as well as technet and other articles on the subject.