One Exchange Server for two AD domains on two Forests

One client is having two locations, each has a separate AD domains and Forest (Windows Server 2008R2), with no trust relationship. Both locations have VPN connections.
The first location has Exchange Server Standard (2010) - To be migrated to 2013 - hosting the first domain.

The requirements are:
- Install Windows 2012 R2 on two new servers and Migrate user accounts for each AD accordingly
- Install Exchange Server 2013 and migrate Mailboxes of the fist domain
- Host the 2nd AD domain on the same Exchange Server

What are the steps to perform this, are there any documents?

Abdullah
cscdubaiAsked:
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Simon Butler (Sembee)ConsultantCommented:
There is no documentation for the scenario that you have outlined.

The fact that the users are in a second unconnected forest just means that all users will need to have two accounts.
Therefore just treat everyone as being in the same forest, creating accounts as required.
When users in the second location connect to Exchange with Outlook, they will be in effect external clients. That means you will need DNS entries to ensure that Autodiscover and Outlook Anywhere connects and they will need to authenticate.

Exchange cannot host two separate AD domains in different Forests.

Simon.
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AmitIT ArchitectCommented:
If I need to design, what you are asking. I might create another forest and domain for Exchange alone and create linked mailbox for other forest. This is called, resource forest concept.  Read this MS KB:
https://technet.microsoft.com/en-us/library/aa998031(v=exchg.150).aspx
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Seth SimmonsSr. Systems AdministratorCommented:
This question has been classified as abandoned and is closed as part of the Cleanup Program. See the recommendation for more details.
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