Setting up a Domain Trust

I currently have two different domains in my network that I keep separate and give limited access to. For example I have domain and, has access to shares on by connecting with a domain users credentials and it works. Now I am running into a problem with my backup software because the backup software is installed in the domain for and I am trying to back up servers in the domain the problem is that the services that run for the backup software application don’t have permissions to domain I was told that I might need to setup a one way domain trust but I would only want to give a one user access just for the backup. Domain is a Windows 2003 server and domain is a Windows 2008 R2 server, domain only needs to see what would be the best way to do this?

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KashConnect With a Mentor 2nd Line EngineerCommented:
Fire up Active Directory Domains and trust from 2008 r2 domain.

right click and select properties

go to trusts

click new trust relationship.

Follow the instructions.
When asked, select to setup an incoming trust.

That's all, AFAIK, in the situation i GUESS you are in.

I told i GUESS you are in that situation because i think you have two separate forests with one domain each.
You may find the answer you seek if you go to:

I had to do some research a little over a year ago and that is where I found my answer.
ahmad1467Author Commented:
I went into the 2008 domain controller that I want to give access to then I went to active Directory Domains a trust /properties/then select trust/new trust and started the wizard. In the Wizard it said to enter the NetBIOS or the DNS name so I select the DNS name of the domain I want to give access to then select next and I get the message that the name specified is not a valid domain name
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