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Configuring Exchange to host multiple e-mail domains

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Configuring Exchange to host multiple e-mail domains

Setting the priority on the new policy

Now that the new policy is created we need to adjust its priority so it is the last one that applies to the sales users.  If this is the only policy you have in place it should get a priority of 1, which makes it the highest priority recipient policy.  The Default Policy is always the lowest.

1.      Under Recipient Policies, right click on the new Sales policy and choose All Tasks\Move up

2.      Repeat until it is higher than any other policy that would apply to the users who match the filter.

  • In my environment, my "Main" policy includes the main domain names and various string replacement e-mail address templates.  The other polices above Sales are filtered by other attributes.  If a user matches sales and any of the lower priority policies, the lower priority ones will be ignored.  If they match sales and a higher priority policy, the sales policy will be ignored.

Forcing a recipient policy update

Now that the new policy has been created and the priorities are setup correctly, you can force Exchange to stamp the new policy on the matching objects.

1.      In ESM, goto <Org>\Recipients\Recipient Update Service

2.      Right click "Recipient Update Services (<domain name>)" and choose Update Now

3.      Open up one of the users who met the filter criteria and view their e-mail addresses, their e-mail addresses should look similar to those below

  • It may take several minutes for the RUS to start and finish processing all users.  If the DC that the RUS is communicating with is in a different AD site it may take over 15 minutes.


Using the steps above you can configure Exchange to accept mail for a new SMTP domain.  In addition, you should now be able to setup new policies to control the e-mail addresses of objects.


If you change the e-mail address generation rules on an existing recipient policy or delete a recipient policy, Exchange does not remove the old\previous addresses set by those policies.  This is to prevent the removal of addresses that users might have used in the past that mail is still being sent to.  To remove old\invalid address, use VBScript or other means.


Configuring Exchange to host multiple e-mail domains

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