Connect two separate established domains

I have a client that recently purchased a new business with a separately established windows domain.

The original company has 4 locations wither a DC at each location.  the main DC is running 2003 Server as well as 1 remote site and the other 2 remote sites are newer and have 2008 Server.

The new business has 5 locations.  All DC's at all sites are running 2008 RS SP1.

From what I have researched the domain forest function level should be 2003.  But will having the new business at domain forest function level 2008 R2 cause an issue?

What I am trying to do is connect the two domains to each other so I can share resources and not have to maintain two separate sets of logins.

Is this possible?
truth_talkerAsked:
Who is Participating?

Improve company productivity with a Business Account.Sign Up

x
Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

All Courses

From novice to tech pro — start learning today.