2 exchange server in 2 different domains

Hi Experts,

I have 2 exchange server in 2 differnet domains.
One user of domain A has an account at exchange server A
Now he needs access to a mailbox of exchange server B in domain B.

Do you know how to do this ?
Eprs_AdminSystem ArchitectAsked:
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AmitIT ArchitectCommented:
Just add permission on mailbox stored on Server B. That will give the user permission to access that mailbox. What is your Exchange version?
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Eprs_AdminSystem ArchitectAuthor Commented:
This is version Exchange 2007.
But both domains have no trust.
Is it done just by the mailbox permissions ?
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R--RCommented:
If domains are in same forest then there will be a automatic trust.
Is both domains in different forest then you have to add trust between domains. then it will work.
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AmitIT ArchitectCommented:
So both are in different forest? If yes, then you create new mailbox in server B, Give that mailbox permission on Server B mailbox, give user name and password to server A user.
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Eprs_AdminSystem ArchitectAuthor Commented:
Yes it is a total different forest.
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Eprs_AdminSystem ArchitectAuthor Commented:
I dont understand, why I should create a new mailbox ?
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AmitIT ArchitectCommented:
If you don't have trust relationship. Creating new user is the only way here.
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Eprs_AdminSystem ArchitectAuthor Commented:
The user has an email account in both domains, so on both exchange servers.
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AmitIT ArchitectCommented:
Then let user access both mailboxes.
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Eprs_AdminSystem ArchitectAuthor Commented:
Yes but how ?
The domains have no trust and Domain B is isolated from A.
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AmitIT ArchitectCommented:
For server B, use OWA.
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Eprs_AdminSystem ArchitectAuthor Commented:
sorry now I understand.
The user in Domain B has now Access to the mailbox.
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