Solved

Exchange connection across domain trust

Posted on 2010-09-15
7
775 Views
Last Modified: 2012-05-10
We have an existing 2003 exchange environment and when we went to upgrade we found out our config is not supported.

So we built a new domain (domain2) and built a 2010 exchange environment with a mailbox server, a hub transport, and a CAS.  Everything works great from outside the network.  We set up a two way trust between domain1 and domain 2

The issue is when a user in domain1 tries to connect to the new exchange server.  It gives a variety of different issues.  We have tried to connect Outlook to the AD server instead of the CAS, and that sometimes will work for the name resolution, but then Outlook crashes later.  It seems to be related to accessing the address list.

If we log into the exact same machine as a local user (no domain) it works just like it does from outside.

There is a hotfix from MS that is supposed to deal with a lot of 2010 issues, but I wanted to see if there was something with the trust that may be causing this issue.
0
Comment
Question by:TacoFlavoredKisses
  • 4
  • 3
7 Comments
 
LVL 39

Expert Comment

by:Adam Brown
ID: 33684715
Are both domains in the same forest? Exchange tends to be a little finicky when there are two organizations in the same forest.
0
 
LVL 1

Author Comment

by:TacoFlavoredKisses
ID: 33702366
Sorry for the delay.  They are in separate forests.
0
 
LVL 39

Accepted Solution

by:
Adam Brown earned 500 total points
ID: 33702937
Okay. It's even worse when you've going from forest to forest. Usually you need a go-between product to handle authentication for Exchange between forests. Microsoft's Identity LifeCycle Manager (ILM) is built to handle that type of situation. The big issue is that Exchange doesn't properly communicate authentication information for users across a trust link. Trusts in general only provide SID translation between forests and Exchange needs a little more than that to work properly.
0
Efficient way to get backups off site to Azure

This user guide provides instructions on how to deploy and configure both a StoneFly Scale Out NAS Enterprise Cloud Drive virtual machine and Veeam Cloud Connect in the Microsoft Azure Cloud.

 
LVL 1

Author Comment

by:TacoFlavoredKisses
ID: 33703713
That is too bad.

If we were to make the trust one way only and not trust domain a in domain b would this resolve the issue and now appear as a non trusted user?
0
 
LVL 39

Expert Comment

by:Adam Brown
ID: 33703784
Possibly. They would be required to enter credentials in the other domain, though. Without the trust, there's no way for them to be authenticated in the other domain, so they have to have a usable account in that domain to do anything in it. Trusts allow you to access most things in domain b using an account located in domain a. However, Exchange can't read or recognize the user in domain a properly, so you would need to create a user in domain b for that user to have access to the domain b exchange features, which is how you would handle authentication between domains without a trust. The problem is that you lose the single sign on capabilities. The user in domain a will have to enter credentials for domain b any time they try to access resources in that domain. Make sense?
0
 
LVL 1

Author Comment

by:TacoFlavoredKisses
ID: 33704401
Makes perfect sense.  Unless there is another way we aren't thinking of this seems like the best option.  So I will have them use accounts for domain b when launching outlook in domain a until we can fully migrate all the network components to the new domain.
0
 
LVL 1

Author Comment

by:TacoFlavoredKisses
ID: 33729528
Did not try to refund, but yet it is trying that.  Trying to object.
0

Featured Post

What is SQL Server and how does it work?

The purpose of this paper is to provide you background on SQL Server. It’s your self-study guide for learning fundamentals. It includes both the history of SQL and its technical basics. Concepts and definitions will form the solid foundation of your future DBA expertise.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Read this checklist to learn more about the 15 things you should never include in an email signature.
A list of top three free exchange EDB viewers that helps the user to extract a mailbox from an unmounted .edb file and get a clear preview of all emails & other items with just a single click on mailboxes.
This tutorial will walk an individual through the steps necessary to join and promote the first Windows Server 2012 domain controller into an Active Directory environment running on Windows Server 2008. Determine the location of the FSMO roles by lo…
This tutorial will walk an individual through the process of configuring their Windows Server 2012 domain controller to synchronize its time with a trusted, external resource. Use Google, Bing, or other preferred search engine to locate trusted NTP …

821 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question