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Change MX in hybrid deployment RRS feed

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    Hi,

    We have Exchange 2010 Hybrid with Office 365. MX record points to our onprem Exchange. After another company bougth us we have request to change the MX record. MX record needs to point on another organizations Exchange. They will add our domain as Internal relay domain.  So every mail for our organization would go through their Exchange. So my question is will this affect our Hybrid deployment? Can it be done? Do we need to change Hybrid deployment?

    quarta-feira, 26 de julho de 2017 07:29

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    I think you need to do a lot more than that.  You won't have all the synchronized recipients in the other company's AD (Exchange) so it won't know how to route the mail to the corresponding mailboxes in Exchange Online.  If you just create a send connector that routes your domain to your Exchange server, and they don't define your domain in their Exchange organization as "Authoritative", then everything should work as it's configured.  The MX routes mail to their Exchange server, which routes it to your Exchange Server, which routes it to Exchange Online.

    Ed Crowley MVP "There are seldom good technological solutions to behavioral problems."
    Celebrating 20 years of providing Exchange peer support!

    quarta-feira, 26 de julho de 2017 16:01