Forward mail from Exchange server to another mail server at a different host

Hello,

I host the e-mail for abc.com on Exchange 2010.  The client is wanting to forward this mail to def.com which is being hosted by another company.  I cannot find a solution specific to this situation.

Please advise.

Thank you,

Don
GEMCCAsked:
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Adam BrownSr Solutions ArchitectCommented:
Open the exchange management console and enter the following:

set-mailbox <user's username> -forwardingsmtpaddress <user@def.com> -delivertomailboxandforward:$true

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This method will allow you to set up forwarding without creating a contact object for the user. This is a much cleaner and less error prone approach (I have seen contact objects break delivery to users that exist and have the same name as the contact object before, it's a weird, rare issue, but it does happen).
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Todd NelsonSystems EngineerCommented:
Create a contact (i.e. jdoe@def.com) and then configure forwarding for the mailbox (i.e. jsmith@abc.com) that receives mail you want to forward to the contact.
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GEMCCAuthor Commented:
But does that just go to my server?
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timgreen7077Exchange EngineerCommented:
Adam is correct. That is the best method instead of creating the contact.
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Hasin Ahmed ChoudharyExchange AdministratorCommented:
How is the setup of DEF.com? Do they have matching mailbox as that of abc.com? Be more specific with the requirements?
Is this case of acquisition or De-merger?

Check if you can simply work with MX records and point it to def.com  or address rewrite suits you?
https://technet.microsoft.com/en-us/library/aa996806(v=exchg.160).aspx 

Above method of forwarding to DEf mail address, will be going through your server. A copy of the email will forward through internet connector or partner connector (if you have it for DEF.com).
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Hector AlvarezSenior EngineerCommented:
You mention "client" and not a "user" from client's domain, so it seems that the client is in the process of getting rid of the abc.com mail domain. The easiest way would be for the other hosting company (sorry) to add the abc.com domain as an accepted domain in the def.com server and then changed the MX records for abc.com to point to the "other" hosting company.
If it was just a "user" you can create a transport rule that forward all inbound mail for user@abc.com to user@def.com
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Todd NelsonSystems EngineerCommented:
Sufficient information provided for a solution.
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GEMCCAuthor Commented:
When I try the command, I get the following:

WARNING: The command completed successfully buy no settings of 'DomainName.local/Users/User' have been modified

Please advise.

Thank you,

Don
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