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Exchange 2010 add new email address space and additional smtp address to all recipients RRS feed

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    HI

    Our company is being bought and we need to change the email address for every recipient within the business group/user.

    I have added the new domain to the Accepted Domains and have confirmed that if I manually change a users smtp address that mail flow works and the postmaster account receives email.

    looking in the E-mail address policies section within the EMC we currently have 2 polices one for the current company policy call company.co.uk with a priority 1 and one called Default policy.

    when I try to edit these I get a warning message which states that this policy was created with an earlier version of exchange I have looked on our exchange 2003 environment and have found the polices and can edit them.

    Now my questions are 

    1. should I create the policy on the exchange 2003 environment or 2010

    2. if I create a new policy on the exchange 2010 environment what will happen to the old addresses?

    3. I must be able to preserve the old addresses and must make the new address space the primary address?

    if anyone could help with the steps required or if there are any gotcha to avoid.

    thanks

    Monday, January 19, 2015 11:19 AM

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     1. should I create the policy on the exchange 2003 environment or 2010
     You have to create in Exchange2010

    2. if I create a new policy on the exchange 2010 environment what will happen to the old addresses?
    Email address policy will change the email address if applied immediately except for the users which has "Automatically update email addresses based on e-mail address policy" option turned on
    You will get the list of users with "Automatically update email addresses based on e-mail address policy" option turned off by the below command. 

    Get-Mailbox -ResultSize Unlimited | Where {$_.EmailAddressPolicyEnabled -eq $False}


    3. I must be able to preserve the old addresses and must make the new address space the primary address?

    Yes but you can keep only one as replying address.
    Please keep both address in the email address policy to preserve old email address to the users.
    If you want an autoreply, then use a hub transport rule in Exchange an Outlook rule and allow auto-replies to the internet. (auto-replies to the outside network is not a good idea)

    Here is a similar case
    http://exchangeserverpro.com/email-address-policies-in-mixed-exchange-20032007-organisations/


    Thanks, MAS
    Please mark as helpful if you find my comment helpful or as an answer if it does answer your question. That will encourage me - and others - to take time out to help you.

    Monday, January 19, 2015 1:04 PM

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     1. should I create the policy on the exchange 2003 environment or 2010
     You have to create in Exchange2010

    2. if I create a new policy on the exchange 2010 environment what will happen to the old addresses?
    Email address policy will change the email address if applied immediately except for the users which has "Automatically update email addresses based on e-mail address policy" option turned on
    You will get the list of users with "Automatically update email addresses based on e-mail address policy" option turned off by the below command. 

    Get-Mailbox -ResultSize Unlimited | Where {$_.EmailAddressPolicyEnabled -eq $False}


    3. I must be able to preserve the old addresses and must make the new address space the primary address?

    Yes but you can keep only one as replying address.
    Please keep both address in the email address policy to preserve old email address to the users.
    If you want an autoreply, then use a hub transport rule in Exchange an Outlook rule and allow auto-replies to the internet. (auto-replies to the outside network is not a good idea)

    Here is a similar case
    http://exchangeserverpro.com/email-address-policies-in-mixed-exchange-20032007-organisations/


    Thanks, MAS
    Please mark as helpful if you find my comment helpful or as an answer if it does answer your question. That will encourage me - and others - to take time out to help you.

    Monday, January 19, 2015 1:04 PM
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    Thanks for your response it was very helpful

    Monday, January 26, 2015 12:20 PM