configure exchange to be Primary with Zimbra

[seisa]

Hi All
I'm testing zimbra and we will be migrating to it but, we need to keep exchange and zimbra working together,as we will not migrate all users at once.
I read about spilting DNS, but I don't know what should be done on the exchange to relay mail beteween it and zimbra.
Can anyone tell me what are the steps for the exchange configurations?

Thanks.

[phoenix]

You want a Split Domain.

[seisa]

sorry for mis-writing.
yes i mean split domain.
i made zimbra configuration but wahat about exchange configuration ?

[seisa]

Yes, I wrote the above commands.

But when I tested sending mail form a test account on zimbra to a mailbox on the exchange it didn't reach the recipient.
So i was wondering if there is any configuration on the exchange to accepts mails from zimbra server.

[seisa]

the mailbox will be delivered to Zimbra account.

I don't understand what you mean by this?

As i understand from split domains zimbra and exchange accounts can send mails to each other.

I created account with zimbra mailbox(zbox.xyz.com) and i'm trying to send for it mail to another account with exchange mailbox (xbox.xyz.com)
the mail doesn't reach the recipeint although when i used the telnet to test sending mails between the 2 server the mails were recieved successfully on both servers.