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Problem with different domains with Exchange 2003 and 2010

Hi there,

I have a problem with this scenario:

A domain X with Exchange 2003 (@x.com) and domain Y with Exchange 2010 (@y.com)
They have trust configured, and internal MX configured.
Has a Routing-Group too.

When I create a new mailbox in domain Y, I can receive and send e-mails between the same domain. But I can´t see the new mailbox in domain X if I configured only mailbox@y.com

If I configured the new mailbox with @x.com and @y.com the mailbox appears in both domains.

I wanna to configure only the @y.com in the mailboxs in domain Y, and continous view in the domain X.
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Solvesystem
Asked:
Solvesystem
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1 Solution
 
Manpreet SIngh KhatraSolutions Architect, Project LeadCommented:
I guess what you are speaking about is GAL sync between environments :)

GAL Sync between 2 forest
http://www.experts-exchange.com/Software/Server_Software/Email_Servers/Exchange/Q_21805464.html

- Rancy
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SolvesystemAuthor Commented:
Hi Rancy,

I think it´s not a problem with GAL because the users appears in GAL, but mailbox in the domain Y with Exchange 2010 don´t receive e-mails if they have only @y.com in the e-mail address.
When the mailbox of Exchange 2010 has @y.com and @x.com the user receive e-mails, even I send user@y.com or user@x.com.
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Manpreet SIngh KhatraSolutions Architect, Project LeadCommented:
Wait how do the emails get transferred ?
What if you have a user with only @x.com ?

- Rancy
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SolvesystemAuthor Commented:
Rancy,

Thanks for your attention, but I resolve the problem.

Happens that the other analist create a external Host A appoint to the MX of the domain Y, and the messages returns with NDR or other error text.
When I delete this Host in DNS and configure correctly in the internal DNS, all messages between both domains delivery normally.

Thanks.
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SolvesystemAuthor Commented:
The problem resolves.
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