Your opinion on an issue exchange 2010 2 different forests

I am currently working for an organization who is company A and we have just acquired a different company of like 1,000 folks. We both have separate forests with no trust and both using Exchange 2010. I was approached because the users have to check their email in basically two places which is a nightmare. What we are trying to do is come up with a temporary way to have the users to be able to check email in one place with two different forests who using exchange 2010. I have been reviewing this myself and thought of things anywhere from setting up a connector to forward email to setting up a internal relay. I figured I will ask the professionals now. What is the best solution to allow two separate companies who do not have a trust but Our autodiscover entry is on the internet to connect and check email in one place. They also VPN to our network to check email.

I am also wondering if this can be done in DNS. If I was going to do this in DNS how would I point all the mail to go to another domain if this is even possible.
techdriveAsked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Malli BoppeCommented:
Are both the forests connected by any WAN links?. If so create trust relationship. The below  guide should expain how to coexist between Exchange forests

http://www.msexchange.org/articles-tutorials/exchange-server-2010/migration-deployment/deep-dive-into-rich-coexistence-between-exchange-forests-part1.html
0
techdriveAuthor Commented:
Thanks for the link but can we do this without setting up a trust. They do not want to setup a trust between each forests/domain. Can I just configure DNS and then just setup a connector directly between hub transport servers bypassing the email appliance. This is over a WAN separate locations.
0
Malli BoppeCommented:
You probably could. You need to have mail enabled contacts in the both the forests. So userA in forest A would have a mailbox in  the forestA but a mail enabled contact in the forest B.
0
Simon Butler (Sembee)ConsultantCommented:
If you are using Outlook 2010 then you can connect to two different forests at the same time.
Otherwise it is going to be a forwarding nightmare, particularly for 1000 users.

Simon.
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
techdriveAuthor Commented:
So can this be done with DNS. If I was to put a pointer to deliver all email from Domain B to Domain A will that work?
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Exchange

From novice to tech pro — start learning today.